mdbg can't debug my hello world program

In order to try out mdbg, I have the following simple hello world program:

 // kkk.cs using System; class HelloMain { static public void Main() { Console.WriteLine("Hello"); } }

Compile it with csc /debug kkk.cs, this yields:

 kkk.exe kkk.pdb

I then do (from the visual studio command line):

mdbg kkk.exe

mdbg !r kkk.exe

I got:

Error: The request is not supported. (Exception from HRESULT: 0x80070032)

2 Answers

I know this question is super old, but I just ran into this and found the 'fix' for this problem. Adding here for any other Googlers..

I have two directories:

Make sure you're launching the correct version (in my case, the x64 version) and doing a 'Run as Administrator' when opening the command prompt.

Try csc /debug /platform:x86 kkk.cs

You're running on 64-bit Windows. Mdbg is a 32-bit process and can only debug 32-bit processes.