如何制作winform得启动画面

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using System.Drawing;

namespace SlashScreenLib
{
    public class SlashScreenForm:Form
    {
        static SlashScreenForm slashScreen;
        Bitmap bitMap;
        public static SlashScreenForm SlashScreen
        {
            get
            {
                if (slashScreen == null)
                {
                    slashScreen = new SlashScreenForm();
                }
                return slashScreen;
            }
        }
 
        public SlashScreenForm()
        {
            //SlashScreen肯定显示在屏幕中央
            this.StartPosition = FormStartPosition.CenterScreen;
            //应该没有边框
            this.FormBorderStyle = FormBorderStyle.None;
            //获取SlashScreen要显示的图片
            bitMap = Resources.Resource.SlashScreen;
            //窗口大小与图片大小一致
            this.ClientSize = bitMap.Size;
            //在图片上写上字
            using (Font f = new Font("宋体", 18))
            {
                using (Graphics g = Graphics.FromImage(bitMap))
                {
                    g.DrawString("Jillzhang", f, Brushes.Black, 100, 142);
                }
            }
            this.BackgroundImage = bitMap;
        }
        protected override void Dispose(bool disposing)
        {
            base.Dispose(disposing);
            if (disposing)
            {
                if (bitMap != null)
                {
                    bitMap.Dispose();
                    bitMap = null;
                }
            }
        }
    }
}