Breakpoints NOT hit when console application run through System.Diagnostics.Process

Posted on 2009-06-29
Medium Priority
Last Modified: 2012-05-07
Hi there,

I have a simple console application which is running fine (.NET 2.0 and Visual Studio 2005). I have placed some breakpoints within the console application and these breakpoints are hit when I execute the console application through visual studio by marking the console project as startup project.  Till this point everthing is fine.

But when I tried to execute the console project using WindowsForm which is using Process() to execute the console project. The console project is running fine with process.Start(), but the problem is that the breakpoints within the console application are NOT hit when I execute the console application through Process() class. I will be thankful for your help.
Question by:tech1guy
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LVL 39

Expert Comment

ID: 24739838
Breakpoints are only hit when you attach a debugger to them. To attach a debugger, you will have to go to Visual Studio after you used Process.Start and then you can select Debug > Attach to Process. From then on, when a break point is hit, it will show in the debugger of Visual Studio.


Author Comment

ID: 24739906
which process I need to attach? When I try to attach the TestForm.exe (where I am calling console app through Process), it says that it is already attached. I am executing through F5.
Moreover, is there a way to programaticaaly attach the debugger to Procees?
LVL 39

Expert Comment

ID: 24740433
It is probably possible to programmatically attach the debugger.

It seems to me that we're mixing two things here. You have one process, let's call it procA.exe and you have another process, which you call TestForm.exe. The second process uses a Process.Start(procA.exe) to start the first process. When you debug TestForm.exe, you cannot debug another process with the same debugger. Either run Testform.exe the normal way (from Explorer) or open a new Visual Studio instance and select Attach To Process in that one, in which way you can debug multiple processes at the same time.
LVL 39

Accepted Solution

abel earned 2000 total points
ID: 24740479
As an alternative, you can try to put the following line somewhere in the beginning of your application procA.exe:


which will popup with a request for debugging, or not if you have already set it to use the default.


Author Closing Comment

ID: 31598102
Thanks for the help!

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