The stub data is used by custom proxy users to decide what to do with an incoming method call. For example, the stub data might be information about the server's context that you can use to determine whether to execute the call locally, or send it through the remoting infrastructure.

Namespace: System.Runtime.Remoting.Proxies
Assembly: mscorlib (in mscorlib.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0, 4.0.0.0