Step into: Stepping over non-user code 'aigFiles.App.App' Step into: Stepping over non-user code 'aigFiles.App.InitializeComponent' A first chance exception of type 'System.Threading.ThreadAbortException' occurred in System.dll Evaluation requires a thread to run temporarily. Use the Watch window to perform the evaluation.Does this mean that I am missing something or that the immediate window cannot be used for what I'm coding in this particular instance? I'm not getting the error all the time, I guess it happens only when the code needs multiple threads. Don't remember having had the same problems in VB.