Resume all thread

ResumeAllThreads.cs

using System;
using System.Diagnostics;
using System.Runtime.InteropServices;

namespace ResumeAllThreads
{
	static class Program
	{
		enum ThreadAccess : int
		{
			SUSPEND_RESUME = (0x0002),
		}
		[DllImport("kernel32.dll")]
		static extern IntPtr OpenThread(ThreadAccess dwDesiredAccess, bool bInheritHandle, uint dwThreadId);
		[DllImport("kernel32.dll")]
		static extern bool CloseHandle(IntPtr hObject);
		[DllImport("kernel32.dll")]
		static extern int ResumeThread(IntPtr hThread);
		static void Main()
		{
			Console.WriteLine("Enter process ID to resume: ");
			var pidtext = Console.ReadLine();
			int pid;
			try
			{
				pid = Convert.ToInt32(pidtext);
			}
			catch
			{
				Console.WriteLine("Invalid PID!");
				return;
			}

			var proc = Process.GetProcessById(pid);
			foreach (ProcessThread thread in proc.Threads)
			{
				var pOpenThread = OpenThread(ThreadAccess.SUSPEND_RESUME, false, (uint)thread.Id);
				if (pOpenThread == IntPtr.Zero)
					continue;
				ResumeThread(pOpenThread);
				CloseHandle(pOpenThread);
			}
		}
	}
}