C# 如何设计一个标准的等待窗体

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace ShowWaiting
{
   public partial class frmWaiting : Form
   {
      public static frmWaiting _Instance = null;
      
      /// <summary>
      /// 私有构造器,禁止外部实例化frmWaiting类
      /// </summary>
      private frmWaiting()
      {
         InitializeComponent();
      }
      
      /// <summary>
      /// 显示等待窗体
      /// </summary>
      /// <param name="owner"></param>
      public static void Show(Form owner)
      {
         owner.UseWaitCursor = true;
         
         if (_Instance == null) _Instance = new frmWaiting();
         _Instance.Owner = owner;
         _Instance.Show();
         
         Application.DoEvents();
      }
      
      /// <summary>
      /// 显示等待窗体
      /// </summary>
      /// <param name="owner"></param>
      public static void Show(Form owner, bool disableOwner)
      {
         owner.UseWaitCursor = true;
         owner.Enabled = !disableOwner;
         
         if (_Instance == null) _Instance = new frmWaiting();
         _Instance.Owner = owner;
         _Instance.Show();
         
         Application.DoEvents();
      }
      
      /// <summary>
      /// 隐藏等待窗体
      /// </summary>
      /// <param name="owner"></param>
      public static void Hide(Form owner)
      {
         owner.UseWaitCursor = false;
         owner.Enabled = true;
         
         if (_Instance != null) _Instance.Hide();
         Application.DoEvents();
      }
   }
}


// 来源:www.CSFramework.com, C/S结构框架学习网