Dear Team,

we have trying to store image to database with resize & compress the image but image store without extetion refer the below code which written by me 

below code is successfully store image to folder 

            // Check file exist or not  
            if (FileUpload1.PostedFile != null)
            {
                // Check the extension of image  
                string extension = Path.GetExtension(FileUpload1.FileName);
                if (extension.ToLower() == ".png" || extension.ToLower() == ".jpg")
                {
                    Stream strm = FileUpload1.PostedFile.InputStream;
                    using (var image = System.Drawing.Image.FromStream(strm))
                    {
                        // Print Original Size of file (Height or Width)   
                        Label1.Text = image.Size.ToString();
                        int newWidth = 100; // New Width of Image in Pixel  
                        int newHeight = 100; // New Height of Image in Pixel  
                        var thumbImg = new Bitmap(newWidth, newHeight);
                        var thumbGraph = Graphics.FromImage(thumbImg);
                        thumbGraph.CompositingQuality = CompositingQuality.HighQuality;
                        thumbGraph.SmoothingMode = SmoothingMode.HighQuality;
                        thumbGraph.InterpolationMode = InterpolationMode.HighQualityBicubic;
                        var imgRectangle = new Rectangle(0, 0, newWidth, newHeight);
                        thumbGraph.DrawImage(image, imgRectangle);
                        // Save the file  
                        string targetPath = Server.MapPath(@"~\Images\") + FileUpload1.FileName;
                        thumbImg.Save(targetPath, image.RawFormat);
                        // Print new Size of file (height or Width)  
                        Label2.Text = thumbImg.Size.ToString();
                        //Show Image  
                        Image1.ImageUrl = @"~\Images\" + FileUpload1.FileName;
                    }
                }
            }

Thanks in advance