C# 软件重复打开

#region 判断系统是否已启动
System.Threading.Mutex mutex = new System.Threading.Mutex(true, "OnlyRun");
if (mutex.WaitOne(0, false)) { }
else
{
MessageBox.Show("程序已经在运行！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
System.Environment.Exit(0);
}
#endregion