контекстный вызов работает и передача объектов по сети тоже

mROA.Test/ITestController.cs

@@ -9,12 +9,16 @@ public interface ITestController
     Task AAsync(CancellationToken cancellationToken);
     int B();
     Task<int> BAsync(CancellationToken cancellationToken);
+
+    TransmittedSharedObject<ITestController> SharedObjectTransmitionTest();
 }
 
 [SharedObjectSingleton]
 public class TestController : ITestController
 {
+    public ITestController? ReturnIfNotNull;
     private int _bOut = 5;
+
     public void A()
     {
         Console.WriteLine("A called");
@@ -34,4 +38,40 @@ public class TestController : ITestController
     {
         return Task.FromResult(5);
     }
+
+    public TransmittedSharedObject<ITestController> SharedObjectTransmitionTest()
+    {
+        return new TransmittionTestController { ReturnIfNotNull = ReturnIfNotNull ?? new TestController() };
+    }
+}
+
+public class TransmittionTestController : ITestController
+{
+    public ITestController ReturnIfNotNull;
+
+    public void A()
+    {
+        Console.WriteLine("A called alternative");
+    }
+
+    public Task AAsync(CancellationToken cancellationToken)
+    {
+        Thread.Sleep(500);
+        return Task.CompletedTask;
+    }
+
+    public int B()
+    {
+        return 456789;
+    }
+
+    public Task<int> BAsync(CancellationToken cancellationToken)
+    {
+        return Task.FromResult(465789);
+    }
+
+    public TransmittedSharedObject<ITestController> SharedObjectTransmitionTest()
+    {
+        return new TestController { ReturnIfNotNull = this };
+    }
 }