How to add image button in coding side

Does it help? Feel free to approve my post

            Button btTest = new Button();

            btTest.Image = Image.FromStream(new FileStream(@"D:\Temp\Chrysanthemum.jpg", FileMode.Open));

            this.Controls.Add(btTest);

I am not sure understanding your problem.
Do you have an image url to use in button like "C:\temp\test.jpg" or "http://www.example.com/test.jpg"?