var a = System.Diagnostics.Process.GetProcessesByName("QQPlayer");
             if (a.Length > 0)
             {
                 bool b;
                 foreach (var s in a.Cast<Process>())
                 {
                     b = !s.HasExited;    //指示关联进程未终止
                     if (b == true)
                     {
                         Console.WriteLine("进程正在运行");
                     }
                     else
                     {
                         Console.WriteLine("进程未运行");
                     }
                 }
             }
             else
             {
                 Console.WriteLine("该进程不存在");
             }