diff --git a/src/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration/Extensions/TypeExtensions.cs b/src/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration/Extensions/TypeExtensions.cs
index 42173e0..0ec0341 100644
--- a/src/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration/Extensions/TypeExtensions.cs
+++ b/src/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration/Extensions/TypeExtensions.cs
@@ -31,6 +31,7 @@ public static class TypeExtensions
                 [typeof(decimal)] = () => new OpenApiSchema {Type = "number", Format = "double"},
                 [typeof(DateTime)] = () => new OpenApiSchema {Type = "string", Format = "date-time"},
                 [typeof(DateTimeOffset)] = () => new OpenApiSchema {Type = "string", Format = "date-time"},
+                [typeof(TimeSpan)] = () => new OpenApiSchema {Type = "string"},
                 [typeof(Guid)] = () => new OpenApiSchema {Type = "string", Format = "uuid"},
                 [typeof(char)] = () => new OpenApiSchema {Type = "string"},
 
@@ -47,6 +48,7 @@ public static class TypeExtensions
                 [typeof(DateTime?)] = () => new OpenApiSchema {Type = "string", Format = "date-time", Nullable = true},
                 [typeof(DateTimeOffset?)] = () =>
                     new OpenApiSchema {Type = "string", Format = "date-time", Nullable = true},
+                [typeof(TimeSpan?)] = () => new OpenApiSchema { Type = "string", Nullable = true },
                 [typeof(Guid?)] = () => new OpenApiSchema {Type = "string", Format = "uuid", Nullable = true},
                 [typeof(char?)] = () => new OpenApiSchema {Type = "string", Nullable = true},
 
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests.Contracts/SampleObject1.cs b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests.Contracts/SampleObject1.cs
index 8bb4a0c..a1ef4f7 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests.Contracts/SampleObject1.cs
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests.Contracts/SampleObject1.cs
@@ -4,6 +4,7 @@
 // ------------------------------------------------------------
 
 using Newtonsoft.Json;
+using System;
 
 namespace Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests.Contracts
 {
@@ -53,5 +54,11 @@ public sealed class SampleObject1
         /// </summary>
         [JsonProperty(PropertyName = "samplePropertyEnum", Required = Required.Always)]
         public SampleEnum1 SamplePropertyEnum { get; set; }
+
+        /// <summary>
+        /// Gets or sets the sample timespan
+        /// </summary>
+        [JsonProperty(PropertyName = "samplePropertyTimespan", Required = Required.Always)]
+        public TimeSpan SamplePropertyTimespan { get; set; }
     }
 }
\ No newline at end of file
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationDefaultVariant.json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationDefaultVariant.json
index acaf56a..b09da0e 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationDefaultVariant.json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationDefaultVariant.json
@@ -631,7 +631,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -667,6 +668,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationVariantSwaggerGroup1.json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationVariantSwaggerGroup1.json
index c54aefc..6d372b6 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationVariantSwaggerGroup1.json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationVariantSwaggerGroup1.json
@@ -151,7 +151,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -187,6 +188,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationVariantSwaggerGroup2.json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationVariantSwaggerGroup2.json
index c54aefc..6d372b6 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationVariantSwaggerGroup2.json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationVariantSwaggerGroup2.json
@@ -151,7 +151,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -187,6 +188,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationsWithCommonAnnotations/AnnotationDefaultVariant.json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationsWithCommonAnnotations/AnnotationDefaultVariant.json
index 1be80f4..013fed5 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationsWithCommonAnnotations/AnnotationDefaultVariant.json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationsWithCommonAnnotations/AnnotationDefaultVariant.json
@@ -703,7 +703,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -739,6 +740,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationsWithCommonAnnotations/AnnotationVariantSwaggerGroup1.json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationsWithCommonAnnotations/AnnotationVariantSwaggerGroup1.json
index 532d31b..a1a05de 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationsWithCommonAnnotations/AnnotationVariantSwaggerGroup1.json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationsWithCommonAnnotations/AnnotationVariantSwaggerGroup1.json
@@ -167,7 +167,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -203,6 +204,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationsWithCommonAnnotations/AnnotationVariantSwaggerGroup2.json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationsWithCommonAnnotations/AnnotationVariantSwaggerGroup2.json
index f9fd3df..4301af5 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationsWithCommonAnnotations/AnnotationVariantSwaggerGroup2.json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationsWithCommonAnnotations/AnnotationVariantSwaggerGroup2.json
@@ -167,7 +167,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -203,6 +204,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationsWithDuplicatePaths/AnnotationDefaultVariant.json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationsWithDuplicatePaths/AnnotationDefaultVariant.json
index 4d8539c..9de0a87 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationsWithDuplicatePaths/AnnotationDefaultVariant.json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationsWithDuplicatePaths/AnnotationDefaultVariant.json
@@ -218,7 +218,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -254,6 +255,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationsWithDuplicatePaths/AnnotationVariantSwaggerGroup1.json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationsWithDuplicatePaths/AnnotationVariantSwaggerGroup1.json
index 9a5a532..2610198 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationsWithDuplicatePaths/AnnotationVariantSwaggerGroup1.json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationsWithDuplicatePaths/AnnotationVariantSwaggerGroup1.json
@@ -93,7 +93,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -129,6 +130,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       }
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationsWithDuplicatePaths/AnnotationVariantSwaggerGroup2.json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationsWithDuplicatePaths/AnnotationVariantSwaggerGroup2.json
index 37aadee..4324957 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationsWithDuplicatePaths/AnnotationVariantSwaggerGroup2.json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/DocumentVariantTests/Output/AnnotationsWithDuplicatePaths/AnnotationVariantSwaggerGroup2.json
@@ -209,7 +209,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -245,6 +246,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       }
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Input/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests.Contracts.dll b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Input/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests.Contracts.dll
index 22160e8..a9e956f 100644
Binary files a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Input/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests.Contracts.dll and b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Input/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests.Contracts.dll differ
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Input/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests.Contracts.xml b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Input/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests.Contracts.xml
index 8438071..13e609c 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Input/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests.Contracts.xml
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Input/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests.Contracts.xml
@@ -89,6 +89,11 @@
             Gets or sets the sample property enum
             </summary>
         </member>
+        <member name="P:Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests.Contracts.SampleObject1.SamplePropertyTimespan">
+            <summary>
+            Gets or sets the sample timespan
+            </summary>
+        </member>
         <member name="T:Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests.Contracts.SampleObject2">
             <summary>
             Sample contract for object 2
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/Annotation.Json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/Annotation.Json
index 00783b6..78e42a6 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/Annotation.Json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/Annotation.Json
@@ -641,7 +641,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -677,6 +678,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationAlternativeParamTags.Json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationAlternativeParamTags.Json
index 8e3e026..9e2fae7 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationAlternativeParamTags.Json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationAlternativeParamTags.Json
@@ -640,7 +640,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -676,6 +677,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationArrayInParamTags.Json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationArrayInParamTags.Json
index 9c8b265..04c5acb 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationArrayInParamTags.Json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationArrayInParamTags.Json
@@ -634,7 +634,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -670,6 +671,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationCamelCase.Json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationCamelCase.Json
index 00783b6..78e42a6 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationCamelCase.Json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationCamelCase.Json
@@ -641,7 +641,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -677,6 +678,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationConflictingPathAndQueryParameters.json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationConflictingPathAndQueryParameters.json
index 3b8893e..319388e 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationConflictingPathAndQueryParameters.json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationConflictingPathAndQueryParameters.json
@@ -557,7 +557,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -593,6 +594,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationIncorrectlyOrderedGeneric.json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationIncorrectlyOrderedGeneric.json
index c8e41bf..552f417 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationIncorrectlyOrderedGeneric.json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationIncorrectlyOrderedGeneric.json
@@ -570,7 +570,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -606,6 +607,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationInvalidUri.json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationInvalidUri.json
index 4aab11d..b7459ec 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationInvalidUri.json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationInvalidUri.json
@@ -615,7 +615,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -651,6 +652,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationInvalidVerb.json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationInvalidVerb.json
index 4aab11d..b7459ec 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationInvalidVerb.json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationInvalidVerb.json
@@ -615,7 +615,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -651,6 +652,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationMultipleRequestMediaTypes.Json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationMultipleRequestMediaTypes.Json
index 9f0788e..0783559 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationMultipleRequestMediaTypes.Json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationMultipleRequestMediaTypes.Json
@@ -655,7 +655,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -691,6 +692,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationMultipleRequestTypes.Json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationMultipleRequestTypes.Json
index d92d7c3..b98a7ed 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationMultipleRequestTypes.Json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationMultipleRequestTypes.Json
@@ -641,7 +641,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -677,6 +678,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationMultipleResponseMediaTypes.Json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationMultipleResponseMediaTypes.Json
index 7c3b1c4..a1d1a70 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationMultipleResponseMediaTypes.Json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationMultipleResponseMediaTypes.Json
@@ -672,7 +672,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -708,6 +709,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationMultipleResponseTypes.Json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationMultipleResponseTypes.Json
index 3f48aea..c646d99 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationMultipleResponseTypes.Json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationMultipleResponseTypes.Json
@@ -641,7 +641,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -677,6 +678,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationNewFilter.Json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationNewFilter.Json
index eab86d3..f7a7547 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationNewFilter.Json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationNewFilter.Json
@@ -94,7 +94,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -130,6 +131,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationOptionalPathParametersBranching.Json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationOptionalPathParametersBranching.Json
index 7c34eac..2ceb29a 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationOptionalPathParametersBranching.Json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationOptionalPathParametersBranching.Json
@@ -1403,7 +1403,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -1439,6 +1440,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationParamNoTypeSpecified.json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationParamNoTypeSpecified.json
index acaf56a..b09da0e 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationParamNoTypeSpecified.json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationParamNoTypeSpecified.json
@@ -631,7 +631,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -667,6 +668,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationParamWithoutInButPresentInUrl.Json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationParamWithoutInButPresentInUrl.Json
index acaf56a..b09da0e 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationParamWithoutInButPresentInUrl.Json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationParamWithoutInButPresentInUrl.Json
@@ -631,7 +631,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -667,6 +668,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationParamWithoutInNotPresentInUrl.Json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationParamWithoutInNotPresentInUrl.Json
index 3b8893e..319388e 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationParamWithoutInNotPresentInUrl.Json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationParamWithoutInNotPresentInUrl.Json
@@ -557,7 +557,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -593,6 +594,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationRequestMissingSeeTag.json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationRequestMissingSeeTag.json
index f63bce8..c684147 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationRequestMissingSeeTag.json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationRequestMissingSeeTag.json
@@ -556,7 +556,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -592,6 +593,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationSummaryWithTags.Json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationSummaryWithTags.Json
index 40a229b..1f5f7e2 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationSummaryWithTags.Json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationSummaryWithTags.Json
@@ -631,7 +631,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -667,6 +668,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationTypeNotFound.json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationTypeNotFound.json
index f63bce8..c684147 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationTypeNotFound.json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationTypeNotFound.json
@@ -556,7 +556,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -592,6 +593,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationUndocumentedGeneric.json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationUndocumentedGeneric.json
index f63bce8..c684147 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationUndocumentedGeneric.json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationUndocumentedGeneric.json
@@ -556,7 +556,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -592,6 +593,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationUndocumentedPathParam.Json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationUndocumentedPathParam.Json
index 3b8893e..319388e 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationUndocumentedPathParam.Json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationUndocumentedPathParam.Json
@@ -557,7 +557,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -593,6 +594,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationWithDuplicateStringInParamName.Json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationWithDuplicateStringInParamName.Json
index 4a6d0c6..ec423a8 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationWithDuplicateStringInParamName.Json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OpenApiDocumentGeneratorTests/Output/AnnotationWithDuplicateStringInParamName.Json
@@ -26,25 +26,25 @@
               "$ref": "#/components/schemas/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests.Contracts.SampleObject1"
             }
           },
-            {
-                "name": "sample-Header-Param2",
-                "in": "header",
-                "description": "Header param 2",
-                "schema": {
-                    "type": "array",
-                    "items": {
-                        "$ref": "#/components/schemas/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests.Contracts.ISampleObject4_Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests.Contracts.SampleObject1-Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests.Contracts.SampleObject2_"
-                    }
-                }
-            },
-            {
-                "name": "$sampleHeaderParam3",
-                "in": "header",
-                "description": "Header param 3",
-                "schema": {
-                    "type": "string"
-                }
-            },
+          {
+            "name": "sample-Header-Param2",
+            "in": "header",
+            "description": "Header param 2",
+            "schema": {
+              "type": "array",
+              "items": {
+                "$ref": "#/components/schemas/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests.Contracts.ISampleObject4_Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests.Contracts.SampleObject1-Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests.Contracts.SampleObject2_"
+              }
+            }
+          },
+          {
+            "name": "$sampleHeaderParam3",
+            "in": "header",
+            "description": "Header param 3",
+            "schema": {
+              "type": "string"
+            }
+          },
           {
             "name": "id",
             "in": "path",
@@ -641,7 +641,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -677,6 +678,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OperationConfigTests/Output/AnnotationApplyToAllOperations.json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OperationConfigTests/Output/AnnotationApplyToAllOperations.json
index 6a5af8d..288b183 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OperationConfigTests/Output/AnnotationApplyToAllOperations.json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OperationConfigTests/Output/AnnotationApplyToAllOperations.json
@@ -614,7 +614,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -650,6 +651,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OperationConfigTests/Output/AnnotationApplyToSomeOperations.json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OperationConfigTests/Output/AnnotationApplyToSomeOperations.json
index 8792ff2..598c295 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OperationConfigTests/Output/AnnotationApplyToSomeOperations.json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OperationConfigTests/Output/AnnotationApplyToSomeOperations.json
@@ -610,7 +610,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -646,6 +647,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OperationConfigTests/Output/AnnotationBlankOperationConfig.json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OperationConfigTests/Output/AnnotationBlankOperationConfig.json
index 737ad0f..8a46340 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OperationConfigTests/Output/AnnotationBlankOperationConfig.json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OperationConfigTests/Output/AnnotationBlankOperationConfig.json
@@ -495,7 +495,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -531,6 +532,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OperationConfigTests/Output/AnnotationNoOperationConfig.json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OperationConfigTests/Output/AnnotationNoOperationConfig.json
index 737ad0f..8a46340 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OperationConfigTests/Output/AnnotationNoOperationConfig.json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OperationConfigTests/Output/AnnotationNoOperationConfig.json
@@ -495,7 +495,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -531,6 +532,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },
diff --git a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OperationConfigTests/Output/AnnotationOverridden.json b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OperationConfigTests/Output/AnnotationOverridden.json
index 208b68e..0f06243 100644
--- a/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OperationConfigTests/Output/AnnotationOverridden.json
+++ b/test/Microsoft.OpenApi.CSharpAnnotations.DocumentGeneration.Tests/OperationConfigTests/Output/AnnotationOverridden.json
@@ -495,7 +495,8 @@
         "required": [
           "samplePropertyString3",
           "samplePropertyString4",
-          "samplePropertyEnum"
+          "samplePropertyEnum",
+          "samplePropertyTimespan"
         ],
         "type": "object",
         "properties": {
@@ -531,6 +532,10 @@
             ],
             "type": "string",
             "description": "Gets or sets the sample property enum"
+          },
+          "samplePropertyTimespan": {
+            "type": "string",
+            "description": "Gets or sets the sample timespan"
           }
         }
       },