C#Windowsデスクトップアプリケーションは1つのインスタンスしか実行しません

1)「プログラムセットの署名」に従って実行されたインスタンスを取得する

/// <summary>
///   “      ”        
///    .EXE          ，        
/// </summary>
/// <param name="runningProcess">       Process</param>
/// <returns>            ture/false</returns>
/// <remarks>          。    ：    。</remarks>
private static bool GetRunningProcessByAssemblyName(out Process runningProcess)
{
    bool returnValue = false;
    runningProcess = null;

    AssemblyName currentAssemblyName = 
             AssemblyName.GetAssemblyName(Assembly.GetExecutingAssembly().Location);
    AssemblyName processAssemblyName = new AssemblyName();

    Process current = Process.GetCurrentProcess();
    Process[] processes = Process.GetProcesses();
    foreach (Process process in processes)
    {
        //         ，       。
        if (process.Id != current.Id && 
            process.ProcessName != "System" &&
            process.ProcessName != "csrss" &&
            process.ProcessName != "svchost" && 
            process.ProcessName != "services" &&
            process.ProcessName != "smss" &&
            process.ProcessName != "winlogon" &&
            process.ProcessName != "explorer" &&
            process.ProcessName != "pds" &&
            process.ProcessName != "alg" &&
            process.ProcessName != "msdtc" &&
            process.ProcessName != "spoolsv" &&
            process.ProcessName != "lsass" &&
            process.ProcessName != "Idle" &&
            process.ProcessName != "iexplore" &&
            process.ProcessName != "sqlserver" &&
            process.ProcessName != "notepad" &&
            process.ProcessName != "360tray" &&
            process.ProcessName != "XDict"
            )
        {
            try
            {
                //         
                processAssemblyName = AssemblyName.GetAssemblyName(process.MainModule.FileName);
            }
            catch (Exception)
            {
                processAssemblyName = null;
            }

            //    GetPublicKey()          ；        ，   GetPublicKey()      Null。
            if (processAssemblyName != null &&
                CompareBytes(currentAssemblyName.GetPublicKey(), 
                                     processAssemblyName.GetPublicKey()))
            {
                runningProcess = process;
                returnValue = true;
                break;
            }
        }
    }
    return returnValue;
}

2)「プロセス名」に従って実行したインスタンスを取得する

/// <summary>
///   “    ”        
/// </summary>
/// <param name="runningProcess">       Process</param>
/// <returns>            ture/false</returns>
/// <remarks>    ：1)          ; 2)      ，     。</remarks>
private static bool GetRunningProcessByProcessName(out Process runningProcess)
{
    bool returnValue = false;
    runningProcess = null;

    Process current = Process.GetCurrentProcess();
    Process[] processes = Process.GetProcessesByName(current.ProcessName);
    foreach (Process process in processes)
    {
        if (process.Id != current.Id)
        {
            if (process.ProcessName == current.ProcessName)
            {
                runningProcess = process;
                returnValue = true;
                break;
            }
        }
    }
    return returnValue;
}

3)「プロセス名とパス」に従って実行したインスタンスを取得する

/// <summary>
///   “       ”        
/// </summary>
/// <param name="runningProcess">       Process</param>
/// <returns>            ture/false</returns>
/// <remarks>    ：              ，     。</remarks>
private static bool GetRunningProcessByProcessFullName(out Process runningProcess)
{
    bool returnValue = false;
    runningProcess = null;

    Process current = Process.GetCurrentProcess();
    Process[] processes = Process.GetProcessesByName(current.ProcessName);
    foreach (Process process in processes)
    {
        if (process.Id != current.Id)
        {
            if (process.MainModule.FileName ==
               Assembly.GetExecutingAssembly().Location)
            {
                runningProcess = process;
                returnValue = true;
                break;
            }
        }
    }
    return returnValue;
}

4)「Mutex」により同一のインスタンスが実行されているか否かを判断する

/// <summary>
///   “Mutex”             
/// </summary>
/// <param name="runningProcess">   null</param>
/// <returns>            ture/false</returns>
/// <remarks>    ：           Process</remarks>
private static bool GetRunningProcessByMutex(out Process runningProcess)
{
    bool returnValue = false;
    runningProcess = null;

    bool isCreated;
    Mutex m = new Mutex(false, "OneInstance", out isCreated);
    if (!(isCreated))
    {
        MessageBox.Show("           。", "  ", 
             MessageBoxButtons.OK, MessageBoxIcon.Information);
    }
    returnValue = !isCreated;
    return returnValue;
}
#region     
/// <summary>
///             
/// </summary>
private static void SetForegroundProcess(Process process)
{
    bool isIcon = IsIconic(process.MainWindowHandle);
    //         
    if (isIcon)
    {
        //     
        ShowWindowAsync(process.MainWindowHandle, SW_RESTORE);
    }
   else
    {
        //          
        SetForegroundWindow(process.MainWindowHandle);
    }
}

/// <summary>
///             
/// </summary>
private static bool CompareBytes(byte[] bytes1, byte[] bytes2)
{
    if (bytes1 == null || bytes2 == null)
        return false;

    if (bytes1.Length != bytes2.Length)
        return false;

    for (int i = 0; i < bytes1.Length; i++)
    {
        if (bytes1[i] != bytes2[i])
            return false;
    }
    return true;
}
#endregion

#region Windows API   
/// <summary>
///           ，     
/// </summary>
/// <param name="hWnd">    </param>
/// <returns>      ，     </returns>
[System.Runtime.InteropServices.DllImport("User32.dll")]
private static extern bool OpenIcon(IntPtr hWnd);

/// <summary>
///         
/// </summary>
/// <param name="hWnd">    </param>
/// <returns>      ，     </returns>
[System.Runtime.InteropServices.DllImport("User32.dll")]
private static extern bool IsIconic(IntPtr hWnd);

/// <summary>
///             
/// </summary>
/// <param name="hWnd">    </param>
/// <returns>      ，     </returns>
[System.Runtime.InteropServices.DllImport("User32.dll")]
private static extern int SetForegroundWindow(IntPtr hWnd);


/// <summary>
///  ShowWindow  ，     ShowWindow           ，        。
///         ，                    。
///                     ，                
/// </summary>
/// <param name="hWnd">    </param>
/// <param name="cmdShow">               </param>
/// <returns>         ，   TRUE（  ），    FALSE（ ）</returns>
[System.Runtime.InteropServices.DllImport("User32.dll")]
private static extern bool ShowWindowAsync(IntPtr hWnd, int cmdShow);
private const int SW_HIDE = 0;           //    ，           
private const int SW_SHOWNORMAL = 1;     //               ，           
private const int SW_SHOWMINIMIZED = 2;  //     ，      
private const int SW_SHOWMAXIMIZED = 3;  //     ，      
private const int SW_SHOWNOACTIVATE = 4; //               ，          
private const int SW_RESTORE = 9;        //               ，           
private const int SW_SHOWDEFAULT = 10;   //                 
#endregion