diff --git a/dotnet/src/Microsoft.Agents.AI.GitHub.Copilot/GitHubCopilotAgent.cs b/dotnet/src/Microsoft.Agents.AI.GitHub.Copilot/GitHubCopilotAgent.cs
index bbebd7a312..6e3f88ee09 100644
--- a/dotnet/src/Microsoft.Agents.AI.GitHub.Copilot/GitHubCopilotAgent.cs
+++ b/dotnet/src/Microsoft.Agents.AI.GitHub.Copilot/GitHubCopilotAgent.cs
@@ -274,8 +274,8 @@ private ResumeSessionConfig CreateResumeConfig()
     }
 
     /// <summary>
-    /// Copies all supported properties from a source <see cref="SessionConfig"/> into a new instance
-    /// with <see cref="SessionConfig.Streaming"/> set to <c>true</c>.
+    /// Copies all supported properties from a source <see cref="SessionConfig"/> into a new instance,
+    /// including <see cref="SessionConfig.Streaming"/>.
     /// </summary>
     internal static SessionConfig CopySessionConfig(SessionConfig source)
     {
@@ -298,13 +298,13 @@ internal static SessionConfig CopySessionConfig(SessionConfig source)
             SkillDirectories = source.SkillDirectories,
             DisabledSkills = source.DisabledSkills,
             InfiniteSessions = source.InfiniteSessions,
-            Streaming = true
+            Streaming = source.Streaming
         };
     }
 
     /// <summary>
     /// Copies all supported properties from a source <see cref="SessionConfig"/> into a new
-    /// <see cref="ResumeSessionConfig"/> with <see cref="ResumeSessionConfig.Streaming"/> set to <c>true</c>.
+    /// <see cref="ResumeSessionConfig"/>, defaulting <see cref="ResumeSessionConfig.Streaming"/> to <c>true</c> when source is null.
     /// </summary>
     internal static ResumeSessionConfig CopyResumeSessionConfig(SessionConfig? source)
     {
@@ -327,7 +327,7 @@ internal static ResumeSessionConfig CopyResumeSessionConfig(SessionConfig? sourc
             SkillDirectories = source?.SkillDirectories,
             DisabledSkills = source?.DisabledSkills,
             InfiniteSessions = source?.InfiniteSessions,
-            Streaming = true
+            Streaming = source?.Streaming ?? true
         };
     }
 
diff --git a/dotnet/tests/Microsoft.Agents.AI.GitHub.Copilot.UnitTests/GitHubCopilotAgentTests.cs b/dotnet/tests/Microsoft.Agents.AI.GitHub.Copilot.UnitTests/GitHubCopilotAgentTests.cs
index 52ea0026dc..2089f28524 100644
--- a/dotnet/tests/Microsoft.Agents.AI.GitHub.Copilot.UnitTests/GitHubCopilotAgentTests.cs
+++ b/dotnet/tests/Microsoft.Agents.AI.GitHub.Copilot.UnitTests/GitHubCopilotAgentTests.cs
@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft. All rights reserved.
+// Copyright (c) Microsoft. All rights reserved.
 
 using System;
 using System.Collections.Generic;
@@ -129,6 +129,7 @@ public void CopySessionConfig_CopiesAllProperties()
             OnUserInputRequest = userInputHandler,
             McpServers = mcpServers,
             DisabledSkills = ["skill1"],
+            Streaming = false,
         };
 
         // Act
@@ -149,7 +150,7 @@ public void CopySessionConfig_CopiesAllProperties()
         Assert.Same(userInputHandler, result.OnUserInputRequest);
         Assert.Same(mcpServers, result.McpServers);
         Assert.Equal(new List<string> { "skill1" }, result.DisabledSkills);
-        Assert.True(result.Streaming);
+        Assert.False(result.Streaming);
     }
 
     [Fact]
@@ -180,6 +181,7 @@ public void CopyResumeSessionConfig_CopiesAllProperties()
             OnUserInputRequest = userInputHandler,
             McpServers = mcpServers,
             DisabledSkills = ["skill1"],
+            Streaming = false,
         };
 
         // Act
@@ -200,7 +202,7 @@ public void CopyResumeSessionConfig_CopiesAllProperties()
         Assert.Same(userInputHandler, result.OnUserInputRequest);
         Assert.Same(mcpServers, result.McpServers);
         Assert.Equal(new List<string> { "skill1" }, result.DisabledSkills);
-        Assert.True(result.Streaming);
+        Assert.False(result.Streaming);
     }
 
     [Fact]