c# - Exception returning: unable to evaluate expression because the code is optimized or a native frame is on top of the call stack -


catch (exception ex) returning "unable evaluate expression because code optimized or native frame on top of call stack" in code:

 cmsql = cnsql.createcommand();   cmsql.commandtext = strsql;  cmsql.commandtype = commandtype.text;   reader = cmsql.executereader();  if (reader.hasrows) {  while (reader.read()) {   session["user_email"] = reader["user_email"].tostring().trim();   session["user_birthday"] = reader["user_birthday"].tostring().trim(); }  response.redirect("default.aspx"); }

what reason?

try adding parameter response.redirect method. if use response.redirect without second parameter, exception threadabortexception occurs.

response.redirect("default.aspx",false);

prb: threadabortexception occurs if use response.end, response.redirect, or server.transfer


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