diff --git a/clients/dotnet/WebClient/MemoryWebClient.cs b/clients/dotnet/WebClient/MemoryWebClient.cs
index 281f9b5cf..bfa480fde 100644
--- a/clients/dotnet/WebClient/MemoryWebClient.cs
+++ b/clients/dotnet/WebClient/MemoryWebClient.cs
@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft. All rights reserved.
+// Copyright (c) Microsoft. All rights reserved.
 
 using System;
 using System.Collections.Generic;
@@ -438,6 +438,11 @@ private async Task<string> ImportInternalAsync(
             // Add files to the form
             for (int i = 0; i < uploadRequest.Files.Count; i++)
             {
+                if (uploadRequest.Files[i].FileContent is { CanSeek: true, Position: > 0 })
+                {
+                    uploadRequest.Files[i].FileContent.Seek(0, SeekOrigin.Begin);
+                }
+
                 string fileName = uploadRequest.Files[i].FileName;
                 byte[] bytes;
                 using (var binaryReader = new BinaryReader(uploadRequest.Files[i].FileContent))