diff --git a/dotnet/src/Microsoft.Agents.AI.GitHub.Copilot/GitHubCopilotAgent.cs b/dotnet/src/Microsoft.Agents.AI.GitHub.Copilot/GitHubCopilotAgent.cs
index bbebd7a312..77f312617d 100644
--- a/dotnet/src/Microsoft.Agents.AI.GitHub.Copilot/GitHubCopilotAgent.cs
+++ b/dotnet/src/Microsoft.Agents.AI.GitHub.Copilot/GitHubCopilotAgent.cs
@@ -274,8 +274,9 @@ 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,
+    /// preserving the <see cref="SessionConfig.Streaming"/> value from <paramref name="source"/> when set.
+    /// When <paramref name="source"/> has no explicit <see cref="SessionConfig.Streaming"/> value, streaming defaults to <c>true</c>.
     /// </summary>
     internal static SessionConfig CopySessionConfig(SessionConfig source)
     {
@@ -298,13 +299,14 @@ internal static SessionConfig CopySessionConfig(SessionConfig source)
             SkillDirectories = source.SkillDirectories,
             DisabledSkills = source.DisabledSkills,
             InfiniteSessions = source.InfiniteSessions,
-            Streaming = true
+            Streaming = source.Streaming ?? true
         };
     }
 
     /// <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"/>, preserving the <see cref="SessionConfig.Streaming"/> value
+    /// from <paramref name="source"/>. When <paramref name="source"/> is <c>null</c>, streaming defaults to <c>true</c>.
     /// </summary>
     internal static ResumeSessionConfig CopyResumeSessionConfig(SessionConfig? source)
     {
@@ -327,7 +329,7 @@ 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..5fb9c44dd7 100644
--- a/dotnet/tests/Microsoft.Agents.AI.GitHub.Copilot.UnitTests/GitHubCopilotAgentTests.cs
+++ b/dotnet/tests/Microsoft.Agents.AI.GitHub.Copilot.UnitTests/GitHubCopilotAgentTests.cs
@@ -129,6 +129,7 @@ public void CopySessionConfig_CopiesAllProperties()
             OnUserInputRequest = userInputHandler,
             McpServers = mcpServers,
             DisabledSkills = ["skill1"],
+            Streaming = true,
         };
 
         // Act
@@ -180,6 +181,7 @@ public void CopyResumeSessionConfig_CopiesAllProperties()
             OnUserInputRequest = userInputHandler,
             McpServers = mcpServers,
             DisabledSkills = ["skill1"],
+            Streaming = true,
         };
 
         // Act
@@ -222,6 +224,40 @@ public void CopyResumeSessionConfig_WithNullSource_ReturnsDefaults()
         Assert.True(result.Streaming);
     }
 
+    [Fact]
+    public void CopySessionConfig_WithStreamingFalse_PreservesStreamingFalse()
+    {
+        // Arrange — caller explicitly disables streaming (issue #4732)
+        var source = new SessionConfig
+        {
+            Streaming = false,
+            SystemMessage = new SystemMessageConfig { Mode = SystemMessageMode.Append, Content = "You are a helpful assistant." },
+        };
+
+        // Act
+        SessionConfig result = GitHubCopilotAgent.CopySessionConfig(source);
+
+        // Assert
+        Assert.False(result.Streaming);
+    }
+
+    [Fact]
+    public void CopyResumeSessionConfig_WithStreamingFalse_PreservesStreamingFalse()
+    {
+        // Arrange — caller explicitly disables streaming (issue #4732)
+        var source = new SessionConfig
+        {
+            Streaming = false,
+            SystemMessage = new SystemMessageConfig { Mode = SystemMessageMode.Append, Content = "You are a helpful assistant." },
+        };
+
+        // Act
+        ResumeSessionConfig result = GitHubCopilotAgent.CopyResumeSessionConfig(source);
+
+        // Assert
+        Assert.False(result.Streaming);
+    }
+
     [Fact]
     public void ConvertToAgentResponseUpdate_AssistantMessageEvent_DoesNotEmitTextContent()
     {