работает при разделенной абстракции и реализации

Example.Backend/Page.cs

@@ -0,0 +1,13 @@
+using System.Text;
+using Example.Shared;
+
+namespace Example.Backend;
+
+public class Page : IPage
+{
+    public string Text;
+    public byte[] GetData()
+    {
+        return Encoding.UTF8.GetBytes(Text);
+    }
+}

Example.Backend/Printer.cs

@@ -0,0 +1,19 @@
+using Example.Shared;
+using mROA.Implementation;
+
+namespace Example.Backend;
+
+
+public class Printer : IPrinter
+{
+    public string Name;
+    public string GetName()
+    {
+        return Name;
+    }
+
+    public TransmittedSharedObject<IPage> Print(string text)
+    {
+        return new Page {Text = text};
+    }
+}

Example.Backend/PrinterFactory.cs

@@ -0,0 +1,14 @@
+using Example.Backend;
+using Example.Shared;
+using mROA.Implementation;
+
+namespace Example.Backend;
+
+[SharedObjectSingleton]
+public class PrinterFactory : IPrinterFactory
+{
+    public TransmittedSharedObject<IPrinter> Create(string printerName)
+    {
+        return new Printer(){Name = printerName};
+    }
+}

Example.Backend/Program.cs

@@ -1,5 +1,5 @@
 using System.Net;
-using Example.Shared;
+using Example.Backend;
 using mROA.Codegen;
 using mROA.Implementation;
 using mROA.Implementation.Bootstrap;
@@ -10,7 +10,7 @@ bootstrap.UseJsonSerialisation();
 bootstrap.UseNetworkGateway(new IPEndPoint(IPAddress.Loopback, 4567));
 bootstrap.UseStreamInteraction();
 bootstrap.UseBasicExecution();
-bootstrap.UseCollectableContextRepository(typeof(IPrinterFactory).Assembly);
+bootstrap.UseCollectableContextRepository(typeof(PrinterFactory).Assembly);
 bootstrap.SetupMethodsRepository(new CoCodegenMethodRepository());
 bootstrap.Build();