判斷該程序是否已有實例運行

using System.Diagnostics;


namespace Assistant.Common
...{
    /**//// <summary>
    /// 進程工具類
    /// </summary>
    public class ProcessUtil
    ...{
        /**//// <summary>
        /// 判斷該程序是否已有實例運行
        /// </summary>
        /// <param name="fileName">實例文件名</param>
        /// <returns>是否有運行實例</returns>
        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;
        }
    }
}