c#实现对屏幕截图

int width = System.Windows.Forms.Screen.PrimaryScreen.Bounds.Width;
int height = System.Windows.Forms.Screen.PrimaryScreen.Bounds.Height;
int top = 0;
int left = 0;
 
System.Drawing.Bitmap printscreen = new System.Drawing.Bitmap( width, height );
System.Drawing.Graphics graphics = System.Drawing.Graphics.FromImage( printscreen as Image );
graphics.CopyFromScreen( top, left, 0, 0, printscreen.Size );
printscreen.Save( outputfile, imagetype );