Need to include following name spaces
using System.Drawing;
using System.Drawing.Drawing2D;
-------------Code-------------
int width=200;
int height=200;
string Path=server.mappath(".") + "\\UploadPhotos\\hello_old.jpg";
System.Drawing.Image OriginalImage = System.Drawing.Image.FromFile(Path);
Bitmap SmallBitmap = new Bitmap(width, height, OriginalImage.PixelFormat);
Graphics SmallImg = Graphics.FromImage(SmallBitmap);
SmallImg.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
SmallImg.DrawImage(OriginalImage, 0, 0, SmallBitmap.Width, SmallBitmap.Height);
//Print to the browser
context.Response.ContentType = "image/jpeg";
SmallBitmap.Save(Response.OutputStream, ImageFormat.Jpeg);
string NewFileName = "";
SmallBitmap.Save(server.mappath(".") + ""\\UploadPhotos\\hello.jpg", ImageFormat.Jpeg);
SmallImg.Dispose();
SmallImg.Dispose();
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