Put watermarks on uploaded images–ASP.NET

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Here’s the simples piece of code in C# which can write some text on an image, eventually making it as a watermark.

StreamReader reader = new StreamReader(Server.MapPath("sample.jpg"));

Bitmap bi = new Bitmap(reader.BaseStream); // base image 
Graphics gr = Graphics.FromImage(bi);
            
string customString = "your string goes here";
gr.DrawString(s, new Font("Cooper Black", 25), Brushes.ForestGreen, new PointF(140, 115));
           
StreamWriter writer = new StreamWriter(Server.MapPath("edited.jpg"));
writer.AutoFlush = true;

bi.Save(writer.BaseStream, ImageFormat.Jpeg); // saving the edited image

reader.Close();
writer.Close();

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