//添加引用
using System.Diagnostics;
        /// <summary>
        /// 判断某个进程是否正在运行
        /// </summary>
        /// <param name="name">进程名</param>
        ///<return>true:进程正在运行,false:该进程不在当前运行进程数组内</return>
public bool ProcessExist(string name)
{
    bool result = false;
    //获取当前系统运行的所有进程
    Process[] processes = System.Diagnostics.Process.GetProcesses();
    //挨个对比是否存在name
    Process process;
    for(int i = 0;i<processes.Length-1;i++)
    {
         process = processes[i];
         if(process.ProcessName.Equals(name))
            result = true;
    }
    return result;
}