C# 以任意角度旋转图片

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

namespace RevolveImageByAngle
{
    public partial class Frm_Main : Form
    {
        public Frm_Main（）
        {
            InitializeComponent（）;
        }
        private Bitmap SourceBitmap;
        private Bitmap MyBitmap;
        private void button2_Click（object sender EventArgs e）
        {
            //打开图像文件
            OpenFileDialog openFileDialog = new OpenFileDialog（）;
            openFileDialog.Filter = “图像文件（JPeg Gif Bmp etc.）|*.jpg;*.jpeg;*.gif;*.bmp;*.tif; *.tiff; *.png| JPeg 图像文件（*.jpg;*.jpeg）|*.jpg;*.jpeg |GIF 图像文件（*.gif）|*.gif |BMP图像文件（*.bmp）|*.bmp|Tiff图像文件（*.tif;*.tiff）|*.tif;

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2011-12-22 23:11  RevolveImageByAngle\
     文件         947  2013-05-25 23:38  RevolveImageByAngle.sln
     文件       28160  2010-11-04 01:58  RevolveImageByAngle.suo
     目录           0  2011-12-22 23:11  RevolveImageByAngle\bin\
     目录           0  2013-05-25 23:38  RevolveImageByAngle\bin\Debug\
     文件       10240  2013-05-25 23:38  RevolveImageByAngle\bin\Debug\RevolveImageByAngle.exe
     文件       24064  2013-05-25 23:38  RevolveImageByAngle\bin\Debug\RevolveImageByAngle.pdb
     文件        2128  2010-07-13 16:55  RevolveImageByAngle\Frm_Main.cs
     文件        4398  2010-07-13 16:49  RevolveImageByAngle\Frm_Main.designer.cs
     文件        5814  2010-07-08 22:25  RevolveImageByAngle\Frm_Main.resx
     目录           0  2011-12-22 23:11  RevolveImageByAngle\obj\
     目录           0  2013-05-25 23:38  RevolveImageByAngle\obj\Debug\
     文件        7206  2013-05-25 23:38  RevolveImageByAngle\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache
     目录           0  2011-12-22 23:11  RevolveImageByAngle\obj\Debug\Refactor\
     文件        4307  2013-05-25 23:38  RevolveImageByAngle\obj\Debug\RevolveImageByAngle.csproj.FileListAbsolute.txt
     文件         850  2013-05-25 23:38  RevolveImageByAngle\obj\Debug\RevolveImageByAngle.csproj.GenerateResource.Cache
     文件        1757  2013-05-25 23:38  RevolveImageByAngle\obj\Debug\RevolveImageByAngle.csprojResolveAssemblyReference.cache
     文件       10240  2013-05-25 23:38  RevolveImageByAngle\obj\Debug\RevolveImageByAngle.exe
     文件         180  2013-05-25 23:38  RevolveImageByAngle\obj\Debug\RevolveImageByAngle.Frm_Main.resources
     文件       24064  2013-05-25 23:38  RevolveImageByAngle\obj\Debug\RevolveImageByAngle.pdb
     文件         180  2013-05-25 23:38  RevolveImageByAngle\obj\Debug\RevolveImageByAngle.Properties.Resources.resources
     目录           0  2013-05-25 23:38  RevolveImageByAngle\obj\Debug\TempPE\
     文件        4608  2013-05-25 23:38  RevolveImageByAngle\obj\Debug\TempPE\Properties.Resources.Designer.cs.dll
     文件         503  2010-07-13 16:49  RevolveImageByAngle\Program.cs
     目录           0  2011-12-22 23:11  RevolveImageByAngle\Properties\
     文件        1370  2010-07-08 22:23  RevolveImageByAngle\Properties\AssemblyInfo.cs
     文件        2878  2013-05-25 23:38  RevolveImageByAngle\Properties\Resources.Designer.cs
     文件        5612  2010-07-08 22:23  RevolveImageByAngle\Properties\Resources.resx
     文件        1119  2013-05-25 23:38  RevolveImageByAngle\Properties\Settings.Designer.cs
     文件         249  2010-07-08 22:23  RevolveImageByAngle\Properties\Settings.settings
     文件        4042  2013-05-25 23:38  RevolveImageByAngle\RevolveImageByAngle.csproj
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