判断该程序是否已有实例运行

using  System.Diagnostics;


namespace  Assistant.Common
... {
    /**//// 

    /// 进程工具类
    /// 

    public class ProcessUtil
    ...{
        /**//// 

        /// 判断该程序是否已有实例运行
        /// 

        /// 实例文件名
        /// 是否有运行实例
        public static bool HasRunningInstance(string fileName)
        ...{
            Process current = Process.GetCurrentProcess();
            Process[] processes = Process.GetProcessesByName(current.ProcessName);

            foreach (Process process in processes)
            ...{
                if (process.Id != current.Id)
                ...{
                    if (fileName.Replace("/", "/") == current.MainModule.FileName)
                    ...{
                        return true;
                    }
                }
            }

            return false;
        }
    }
}