using System;
using System.Collections.Generic;
using System.Text;

using Microsoft.VisualBasic.ApplicationServices;

namespace SingleInstanceSample {
  // SingleInstanceApplication.cs
  class SingleInstanceApplication : WindowsFormsApplicationBase {

    private static SingleInstanceApplication application;
    internal static SingleInstanceApplication Application {
      get {
        if( application == null ) {
          application = new SingleInstanceApplication();
        }
        return application;
      }
    }
    
    // Must call base constructor to ensure correct initial 
    // WindowsFormsApplicationBase configuration
    public SingleInstanceApplication() {

      // This ensures the underlying single-SDI framework is employed, 
      // and OnStartupNextInstance is fired
      this.IsSingleInstance = true;
    }

    protected override void OnCreateMainForm() {
      this.MainForm = new MainForm();
    }
  }

}