using System; using System.Collections.Generic; using System.Linq; using System.Threading.Tasks; using System.Windows.Forms; namespace GetMembership { static class Program { /// /// 应用程序的主入口点。 /// [STAThread] static void Main() { bool createNew; using (System.Threading.Mutex m = new System.Threading.Mutex(true, Application.ProductName, out createNew)) { if (createNew) { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); Application.Run(new LodData()); } else { //MessageBox.Show("Only one instance of this application is allowed!"); } } } } }