ThreadAbortException

If you use the Response.End, Response.Redirect, or Server.Transfer method, a ThreadAbortException exception occurs. You can use a try-catch statement to catch this exception.

To work around this problem, use one of the following methods:
For Response.End, call the HttpContext.Current.ApplicationInstance.CompleteRequest method instead ofResponse.End to bypass the code execution to the Application_EndRequest event.
For Response.Redirect, use an overload, Response.Redirect(String url, bool endResponse) that passes false for the endResponse parameter to suppress the internal call to Response.End. For example:

  Response.Redirect ("nextpage.aspx", false);
      
If you use this workaround, the code that follows Response.Redirect is executed.

For Server.Transfer, use the Server.Execute method instead.