Upload a picture and modify its size (C #)

Upload pictures upload pictures and modify their size
Thefile is a file Field HTML control
Thefile. Postedfile.saveas (System.Web.HttpContext.Current.Server.MapPath ("temp.png"));
MemoryStream memstream=new MemoryStream ();
System.Drawing.Image imgoutput =system.drawing.bitmap.fromfile (System.Web.HttpContext.Current.Server.MapPath (" Temp.png "));
Modified to 80x80 size
System.Drawing.Image imgoutput2=imgoutput.getthumbnailimage (80,80,null,intptr.zero);
Imgoutput2.save (System.Web.HttpContext.Current.Server.MapPath ("Image.png"), imageformat.png);
Response.Write (Thefile. Postedfile.filename);
Response.Write ("Len:" +memstream.length.tostring ());
Imgoutput.dispose ();
Imgoutput2.dispose ();
Response.Write ("Upload success!");
Response.Write (System.Web.HttpContext.Current.Server.MapPath ("image.png"));
-----------------------------------------
What is it like to float? Heaven and earth a gull.