Is there a way to detect if a debugger is attached to a process from c#

Question

I have a program that Process.Start()'s another program, and shuts it down after N seconds.

Sometimes I choose to attach a debugger to the started program. In those cases, I don't want the process shut down after N seconds.

I'd like the host program to detect if a debugger is attached or not, so it can choose to not shut it down.

Clarification: I'm not looking to detect if a debugger is attached to my process, I'm looking to detect if a debugger is attached to the process I spawned.

Answer 1

if(System.Diagnostics.Debugger.IsAttached)
{
    // ...
}

Answer 2

You will need to P/Invoke down to CheckRemoteDebuggerPresent. This requires a handle to the target process, which you can get from Process.Handle.

Answer 3

I know this is old, but I was having the same issue and realized if you have a pointer to the EnvDTE, you can check if the process is in Dte.Debugger.DebuggedProcesses:

foreach (EnvDTE.Process p in Dte.Debugger.DebuggedProcesses) {
  if (p.ProcessID == spawnedProcess.Id) {
    // stuff
  }
}

The CheckRemoteDebuggerPresent call only checks if the process is being natively debugged, I believe - it won't work for detecting managed debugging.