How to wait for the first of the 2: a process and an EventWaitHandle

Question

I want to WaitForMultipleObjects on 2 different types:

• an 'EventWaitHandle'
• a 'Process.Handle' ==> intptr

I don't know how to convert (in the appropriate way) "process.Handle" to a WaitHandle in order to have the following code working:

   var waitHandles = new WaitHandle[2];
   waitHandles[0] = waitHandleExit;
   // Next line is the offending one:
   waitHandles[1] = new SafeWaitHandle(process.Handle, false);
   int waitResult = WaitHandle.WaitAny(waitHandles, timeOut);

Im getting the error:

Error   1   Cannot implicitly convert type 'Microsoft.Win32.SafeHandles.SafeWaitHandle' to 'System.Threading.WaitHandle' ...

Anybody know the right way to wait for a process and an EventWaitHandle ?

Update... Reasons for my choice of answer.

First of all thanks to all: Jaroen, Slugart and Sriram. All answers were very nice.

• Jaroen solution for a reason I ignored didn't work on my machine. My 'Exited' event never occured (perhaps only on Disposed?).
• Slugart solution worked perfectly and I tried it before I red its answer.
• Sriram solution worked perfectly and I opted for it because I do not create a false EventWaitHandle and seems to be more clean according to my vision.

Thanks a lots!!!

Answer 1

You could subclass the WaitHandle which represents Process.Handle and use instance of that WaitHandle to wait.

public class ProcessWaitHandle : WaitHandle
{
    private readonly Process process;
    public ProcessWaitHandle(Process process)
    {
        this.process = process;
        this.SafeWaitHandle = new SafeWaitHandle(process.Handle, false);
    }
}

var waitHandles = new WaitHandle[2]
{
    waitHandleExit,
    new ProcessWaitHandle(process)
};
int waitResult = WaitHandle.WaitAny(waitHandles, timeOut);