System.Diagnostics.Process.GetProcessHandle C# (CSharp) Method

        private SafeProcessHandle GetProcessHandle(int access, bool throwIfExited)
        {
#if FEATURE_TRACESWITCH
            Debug.WriteLineIf(_processTracing.TraceVerbose, "GetProcessHandle(access = 0x" + access.ToString("X8", CultureInfo.InvariantCulture) + ", throwIfExited = " + throwIfExited + ")");
#if DEBUG
            if (_processTracing.TraceVerbose) {
                StackFrame calledFrom = new StackTrace(true).GetFrame(0);
                Debug.WriteLine("   called from " + calledFrom.GetFileName() + ", line " + calledFrom.GetFileLineNumber());
            }
#endif
#endif
            if (_haveProcessHandle)
            {
                if (throwIfExited)
                {
                    // Since haveProcessHandle is true, we know we have the process handle
                    // open with at least SYNCHRONIZE access, so we can wait on it with 
                    // zero timeout to see if the process has exited.
                    using (ProcessWaitHandle waitHandle = new ProcessWaitHandle(_processHandle))
                    {
                        if (waitHandle.WaitOne(0))
                        {
                            if (_haveProcessId)
                                throw new InvalidOperationException(SR.Format(SR.ProcessHasExited, _processId.ToString(CultureInfo.CurrentCulture)));
                            else
                                throw new InvalidOperationException(SR.ProcessHasExitedNoId);
                        }
                    }
                }
                return _processHandle;
            }
            else
            {
                EnsureState(State.HaveId | State.IsLocal);
                SafeProcessHandle handle = SafeProcessHandle.InvalidHandle;
                handle = ProcessManager.OpenProcess(_processId, access, throwIfExited);
                if (throwIfExited && (access & Interop.Advapi32.ProcessOptions.PROCESS_QUERY_INFORMATION) != 0)
                {
                    if (Interop.Kernel32.GetExitCodeProcess(handle, out _exitCode) && _exitCode != Interop.Kernel32.HandleOptions.STILL_ACTIVE)
                    {
                        throw new InvalidOperationException(SR.Format(SR.ProcessHasExited, _processId.ToString(CultureInfo.CurrentCulture)));
                    }
                }
                return handle;
            }
        }

 static SafeProcessHandle SafeGetHandle(Process process)
 {
     try
     {
         return(process.GetProcessHandle(Interop.Advapi32.ProcessOptions.PROCESS_QUERY_LIMITED_INFORMATION, false));
     }
     catch (Win32Exception)
     {
         return(SafeProcessHandle.InvalidHandle);
     }
 }