diff --git a/csharp/Squidex.ClientLibrary/CodeGeneration/Client.Class.liquid b/csharp/Squidex.ClientLibrary/CodeGeneration/Client.Class.liquid
index c240e88..b5c0044 100644
--- a/csharp/Squidex.ClientLibrary/CodeGeneration/Client.Class.liquid
+++ b/csharp/Squidex.ClientLibrary/CodeGeneration/Client.Class.liquid
@@ -234,10 +234,12 @@
 {%                 for parameter in operation.FormParameters %}
 {%                     if parameter.IsNullable -%}
                 if ({{ parameter.VariableName }} != null)
-{%                     else -%}
+{%                     elsif parameter.IsNullable == false and parameter.IsRequired -%}
                 if ({{ parameter.VariableName }} == null)
                     throw new System.ArgumentNullException("{{ parameter.VariableName }}");
                 else
+{%                     else -%}
+                if ({{ parameter.VariableName }} != null)
 {%                     endif -%}
                 {
 {%                     if parameter.IsFile -%}
diff --git a/csharp/Squidex.ClientLibrary/Directory.Build.props b/csharp/Squidex.ClientLibrary/Directory.Build.props
index 7ef243d..c502920 100644
--- a/csharp/Squidex.ClientLibrary/Directory.Build.props
+++ b/csharp/Squidex.ClientLibrary/Directory.Build.props
@@ -15,7 +15,7 @@
     <PackageTags>Squidex HeadlessCMS</PackageTags>
     <PublishRepositoryUrl>true</PublishRepositoryUrl>
     <SymbolPackageFormat>snupkg</SymbolPackageFormat>
-    <Version>19.6.0</Version>
+    <Version>19.7.0</Version>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(GITHUB_ACTIONS)' == 'true'">
diff --git a/csharp/Squidex.ClientLibrary/Squidex.ClientLibrary/Generated.cs b/csharp/Squidex.ClientLibrary/Squidex.ClientLibrary/Generated.cs
index 6324c7a..25fc101 100644
--- a/csharp/Squidex.ClientLibrary/Squidex.ClientLibrary/Generated.cs
+++ b/csharp/Squidex.ClientLibrary/Squidex.ClientLibrary/Generated.cs
@@ -1,4 +1,4 @@
-//----------------------
+//----------------------
 // <auto-generated>
 //     Generated using the NSwag toolchain v14.0.1.0 (NJsonSchema v11.0.0.0 (Newtonsoft.Json v13.0.0.0)) (http://NSwag.org)
 // </auto-generated>
@@ -16796,9 +16796,7 @@ private static Newtonsoft.Json.JsonSerializerSettings CreateSerializerSettings()
                     content_.Headers.Remove("Content-Type");
                     content_.Headers.TryAddWithoutValidation("Content-Type", "multipart/form-data; boundary=" + boundary_);
 
-                    if (file == null)
-                        throw new System.ArgumentNullException("file");
-                    else
+                    if (file != null)
                     {
                         var content_file_ = new System.Net.Http.StreamContent(file.Data);
                         if (!string.IsNullOrEmpty(file.ContentType))
@@ -16806,16 +16804,12 @@ private static Newtonsoft.Json.JsonSerializerSettings CreateSerializerSettings()
                         content_.Add(content_file_, "file", file.FileName ?? "file");
                     }
 
-                    if (fileUrl == null)
-                        throw new System.ArgumentNullException("fileUrl");
-                    else
+                    if (fileUrl != null)
                     {
                         content_.Add(new System.Net.Http.StringContent(ConvertToString(fileUrl, System.Globalization.CultureInfo.InvariantCulture)), "fileUrl");
                     }
 
-                    if (fileName == null)
-                        throw new System.ArgumentNullException("fileName");
-                    else
+                    if (fileName != null)
                     {
                         content_.Add(new System.Net.Http.StringContent(ConvertToString(fileName, System.Globalization.CultureInfo.InvariantCulture)), "fileName");
                     }
@@ -17178,9 +17172,7 @@ private static Newtonsoft.Json.JsonSerializerSettings CreateSerializerSettings()
                     content_.Headers.Remove("Content-Type");
                     content_.Headers.TryAddWithoutValidation("Content-Type", "multipart/form-data; boundary=" + boundary_);
 
-                    if (file == null)
-                        throw new System.ArgumentNullException("file");
-                    else
+                    if (file != null)
                     {
                         var content_file_ = new System.Net.Http.StreamContent(file.Data);
                         if (!string.IsNullOrEmpty(file.ContentType))
@@ -17188,16 +17180,12 @@ private static Newtonsoft.Json.JsonSerializerSettings CreateSerializerSettings()
                         content_.Add(content_file_, "file", file.FileName ?? "file");
                     }
 
-                    if (fileUrl == null)
-                        throw new System.ArgumentNullException("fileUrl");
-                    else
+                    if (fileUrl != null)
                     {
                         content_.Add(new System.Net.Http.StringContent(ConvertToString(fileUrl, System.Globalization.CultureInfo.InvariantCulture)), "fileUrl");
                     }
 
-                    if (fileName == null)
-                        throw new System.ArgumentNullException("fileName");
-                    else
+                    if (fileName != null)
                     {
                         content_.Add(new System.Net.Http.StringContent(ConvertToString(fileName, System.Globalization.CultureInfo.InvariantCulture)), "fileName");
                     }
@@ -17675,9 +17663,7 @@ private static Newtonsoft.Json.JsonSerializerSettings CreateSerializerSettings()
                     content_.Headers.Remove("Content-Type");
                     content_.Headers.TryAddWithoutValidation("Content-Type", "multipart/form-data; boundary=" + boundary_);
 
-                    if (file == null)
-                        throw new System.ArgumentNullException("file");
-                    else
+                    if (file != null)
                     {
                         var content_file_ = new System.Net.Http.StreamContent(file.Data);
                         if (!string.IsNullOrEmpty(file.ContentType))
@@ -17685,16 +17671,12 @@ private static Newtonsoft.Json.JsonSerializerSettings CreateSerializerSettings()
                         content_.Add(content_file_, "file", file.FileName ?? "file");
                     }
 
-                    if (fileUrl == null)
-                        throw new System.ArgumentNullException("fileUrl");
-                    else
+                    if (fileUrl != null)
                     {
                         content_.Add(new System.Net.Http.StringContent(ConvertToString(fileUrl, System.Globalization.CultureInfo.InvariantCulture)), "fileUrl");
                     }
 
-                    if (fileName == null)
-                        throw new System.ArgumentNullException("fileName");
-                    else
+                    if (fileName != null)
                     {
                         content_.Add(new System.Net.Http.StringContent(ConvertToString(fileName, System.Globalization.CultureInfo.InvariantCulture)), "fileName");
                     }
@@ -19547,9 +19529,7 @@ private static Newtonsoft.Json.JsonSerializerSettings CreateSerializerSettings()
                     content_.Headers.Remove("Content-Type");
                     content_.Headers.TryAddWithoutValidation("Content-Type", "multipart/form-data; boundary=" + boundary_);
 
-                    if (file == null)
-                        throw new System.ArgumentNullException("file");
-                    else
+                    if (file != null)
                     {
                         var content_file_ = new System.Net.Http.StreamContent(file.Data);
                         if (!string.IsNullOrEmpty(file.ContentType))
@@ -19557,16 +19537,12 @@ private static Newtonsoft.Json.JsonSerializerSettings CreateSerializerSettings()
                         content_.Add(content_file_, "file", file.FileName ?? "file");
                     }
 
-                    if (fileUrl == null)
-                        throw new System.ArgumentNullException("fileUrl");
-                    else
+                    if (fileUrl != null)
                     {
                         content_.Add(new System.Net.Http.StringContent(ConvertToString(fileUrl, System.Globalization.CultureInfo.InvariantCulture)), "fileUrl");
                     }
 
-                    if (fileName == null)
-                        throw new System.ArgumentNullException("fileName");
-                    else
+                    if (fileName != null)
                     {
                         content_.Add(new System.Net.Http.StringContent(ConvertToString(fileName, System.Globalization.CultureInfo.InvariantCulture)), "fileName");
                     }
@@ -28084,4 +28060,4 @@ public SquidexException(string message, int statusCode, string response, System.
 #pragma warning restore 3016
 #pragma warning restore 8603
 #pragma warning restore 8604
-#pragma warning restore 8625
\ No newline at end of file
+#pragma warning restore 8625