Change Image Resolution

if (fileUploadImage.HasFile)
 {
 int fileSize = fileUploadImage.PostedFile.ContentLength;
  
 if (fileSize > Convert.ToInt32(ConfigurationManager.AppSettings["fileSize"]))
 {
 lblUploadImage.Visible = true;
 }
 else
 {
 String fileName = fileUploadImage.FileName.ToString();//Substring (0,fileUploadImage.FileName.IndexOf("."));
  
 string fileNameUrl = ConfigurationManager.AppSettings["imagepath"] + GenerateUniqueFileName(txtFname.Text, Path.GetExtension(fileName));
  
 Bitmap upBmp = (Bitmap)Bitmap.FromStream(fileUploadImage.PostedFile.InputStream);
  
 
Bitmap newBmp = new Bitmap(50,50, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
  
 
newBmp.SetResolution(72, 72);
  
 Graphics newGraphic = Graphics.FromImage(newBmp);
  
 
try
 {
  
 
newGraphic.Clear(Color.White);
  
 
newGraphic.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
  
 
newGraphic.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
  
 
newGraphic.DrawImage(upBmp, 500, 100, 500, 100);
  
 
newBmp.Save(MapPath(fileNameUrl));
  
 
//Show the uploaded resized picture in the image control
  
 
imgProfile.Src = fileNameUrl;
  
 
lblUploadImage.Visible = true;
 }
 catch(Exception exp)
 {
 }
 // fileUploadImage.SaveAs(Server.MapPath(fileNameUrl));
 // HiddenField1.Value = fileNameUrl;
 // imgProfile.Src = fileNameUrl;
 // lblUploadImage.Visible = false;
 }