您可以使用System.Drawing
//1. create a bitmap (create a empty one or from file)
Bitmap bmpPic = new Bitmap(imgWidth,imgHeight);
//2. pass that bitmap into Graphics
using (Graphics g = Graphics.FromImage(bmpPic))
{
//manipulate the image
}
//3. save the bitmap back to a filestream
bmpPic.Save(imgFileStream,ImageFormat.Png);
Run Code Online (Sandbox Code Playgroud)
只需确保处置所有用作 System.Drawing 使用非托管 GDI+ 资源的资源