Output from an Exception class in App_Code

I am trying to see what exception is happening on my dev clients devserver (our servers are fine) and I have an TestException.cs class that handles the most of my exceptions from my sql statement class.

I have a method like so:

StringBuilder errorMessages = new StringBuilder();
 
 for (int i = 0; i < innerException.Errors.Count; i++)
 {
   errorMessages.Append("Index #" + i + "\n" +
     "Message: " + innerException.Errors[i].Message + "\n" +
     "LineNumber: " + innerException.Errors[i].LineNumber + "\n" +
     "Source: " + innerException.Errors[i].Source + "\n" +
     "Procedure: " + innerException.Errors[i].Procedure + "\n");
 }
 
 //Console.WriteLine(errorMessages.ToString());
 Response.Clear();
 Response.Write("FAILURE");
 Response.End();
 

But the Response.XX won't compile and if I use console.writeline when it hits it on the client server, the browser gets a connection lost webpage.

Is there a better way to do this?

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