c#图像重新着色

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
namespace WindowsApplication2
{
    public partial class Form18 : Form
    {
        public Form18()
        {
            InitializeComponent();
        }
        private void panel1_Paint(object sender, PaintEventArgs e)
        {
            Graphics g = e.Graphics;
            using (Bitmap bmp = new Bitmap(@"d:/我的文档/桌面/ico/Administrator.bmp"))
            {
                ColorMap[] colorMap = new ColorMap[1];
                colorMap[0] = new ColorMap();
                colorMap[0].OldColor = Color.Blue;
                colorMap[0].NewColor = Color.White;
                ImageAttributes attr = new ImageAttributes();
                attr.SetRemapTable(colorMap);
                Rectangle rect = new Rectangle(0, 0, bmp.Width, bmp.Height);
                rect.Offset(0, 0);
                g.DrawImage(bmp, rect, 0, 0, rect.Width, rect.Height, g.PageUnit, attr);
            }
        }
    }
    
}