ListView Column Sort Error messages

Please try the attached sample. I can’t reproduce also simulating long sorting times. If you enable the exceptions in VS you can send the stack trace. Debug->Windows->Exception Settings, check Common Language Runtime. You’ll get a bunch of exceptions when starting up, they are all internal handled exceptions from System.Web, IIS Express and so on, ignore them. Then when you reproduce the exception you mentioned VS will stop and you can see the stack trace.