/// <summary>
/// 通过FileStream 来打开文件，这样就可以实现不锁定Image文件，到时可以让多用户同时访问Image文件
/// </summary>
/// <param name=”path”></param>
/// <returns></returns>
public static Bitmap ReadImageFile(string path)
{
FileStream fs = File.OpenRead(path); //OpenRead
int filelength = 0;
filelength = (int)fs.Length; //获得文件长度
Byte[] image = new Byte[filelength]; //建立一个字节数组
fs.Read(image, 0, filelength); //按字节流读取
System.Drawing.Image result = System.Drawing.Image.FromStream(fs);
fs.Close();
Bitmap bit = new Bitmap(result);
return bit;
}