gistfile1.txt

~/Desktop$ cat x.cs
public class Test
{
	public static void Main ()
	{
		throw new System.Exception ();
	}
}
~/Desktop$ csc x.cs -debug:portable
Microsoft (R) Visual C# Compiler version 2.0.0.61205
Copyright (C) Microsoft Corporation. All rights reserved.

~/Desktop$ mono --debug x.exe

Unhandled Exception:
System.Exception: Exception of type 'System.Exception' was thrown.
  at Test.Main () [0x00001] in /home/atsushi/Desktop/x.cs:5 
[ERROR] FATAL UNHANDLED EXCEPTION: System.Exception: Exception of type 'System.Exception' was thrown.
  at Test.Main () [0x00001] in /home/atsushi/Desktop/x.cs:5 
~/Desktop$ rm x.pdb 
~/Desktop$ mono --debug x.exe

Unhandled Exception:
System.Exception: Exception of type 'System.Exception' was thrown.
  at Test.Main () [0x00001] in <7e598ffd03d14b1188aa6f5ddb9b9d3d>:0 
[ERROR] FATAL UNHANDLED EXCEPTION: System.Exception: Exception of type 'System.Exception' was thrown.
  at Test.Main () [0x00001] in <7e598ffd03d14b1188aa6f5ddb9b9d3d>:0