XS202106036827/PMSUI/Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace PMSUI
{
    static class Program
    {
        /// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main()
        {
            bool createNew;
            using (Mutex mutex = new Mutex(true, Application.ProductName, out createNew))
            {
                if (createNew)
                {
                    Application.EnableVisualStyles();
                    Application.SetCompatibleTextRenderingDefault(false);
                    Application.Run(new CLoginForm());
                }
                else
                {
                    Assembly ass = Assembly.GetExecutingAssembly();
                    AssemblyName assName = ass.GetName();

                    // 程序已经运行,显示提示后退出
                    MessageBox.Show(string.Format("{0}正在运行！\r\n{0} Has Been Opened!", assName.Name), "错误 Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
        }
    }
}