I'm trying to do this for the first time. While I can't send the exact code, here is in essence what I'm doing:
public void CallMyService() { MyService service = new MyService(); service.BeginCallMethod( new AsyncCallback(this.CallMethodResultCallback), service ); } public void CallMethodResultCallback(IAsyncResult ar) { MyService service = (MyService)ar.AsyncState; string result = service.EndCallMethod(ar); ... } So the callback happens, and if I set a break point, I can get the result. But sometime soon afterward I get a "System.IO.IOException" with the following message: "Unable to read data from the transport connection" Call stack says I'm in System.Net.Connection::ReadCallback() This does seem to happen when I try to put the string in a UI control. Is this not allowed? Is there a way to create the AsyncCallback such that it will be called on the UI thread? Thanks for any help! -John You can read messages from the DOTNET archive, unsubscribe from DOTNET, or subscribe to other DevelopMentor lists at http://discuss.develop.com.