Question

Why am I getting the exception While executing the Server.Transfer()…

Server.Transfer(@"~/Student/StudentSendMail.aspx?username=" + username);

{Unable to evaluate expression because the code is optimized or a native frame is on top of the call stack.}

Answer 1

One cause of this strange error message is performing a Server.Transfer inside of a try-catch block. There are a couple of ways to handle that:

1) Add a second argument set to false like this:

Server.Transfer(@"~/Student/StudentSendMail.aspx?username=" + username, false);

2) Catch the Exception of type System.Threading.ThreadAbortException and do nothing in the catch block so the exception is ignored

3) Move the Server.Transfer to the Finally block