title: Error: Well-know object must derive from the MarshalByRefObject
body: <p>I'm doing a application with 3-tier, I created server by Window Service and it runs without errors, but the client has an error<a href="https://i.stack.imgur.com/eFyiY.png" rel="nofollow noreferrer">enter image description here</a>. Please help me solve it. Thanks</p>