diff --git a/dotnet/src/Microsoft.AutoGen/Contracts/PythonEquiv/IUnboundSubscriptionDefinition.cs b/dotnet/src/Microsoft.AutoGen/Contracts/PythonEquiv/IUnboundSubscriptionDefinition.cs
new file mode 100644
index 000000000..e1ff1684f
--- /dev/null
+++ b/dotnet/src/Microsoft.AutoGen/Contracts/PythonEquiv/IUnboundSubscriptionDefinition.cs
@@ -0,0 +1,10 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// IUnboundSubscriptionDefinition.cs
+
+
+namespace Microsoft.AutoGen.Contracts.Python;
+
+public interface IUnboundSubscriptionDefinition
+{
+    public ISubscriptionDefinition Bind(AgentType agentType);
+}
\ No newline at end of file