You should define ProcessStartInfo, something like this:
System.Diagnostics.ProcessStartInfo procInfo = new System.Diagnostics.ProcessStartInfo();
procInfo.FileName = ("mspaint.exe");
procInfo.Arguments = ImageFilePath;
And then start the process:
System.Diagnostics.Process.Start(procInfo);
Here is info about this method on MSDN;
Process.Start[
^]
I didn't test this but it should work.