storing image to database

Question

i would like to store one image to databse. while inserting it shows an exception like

 

"Object reference not set to an instance of an object" in

 

 "pictureBox2.Image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg)" this line

 

here is my code to insert 

 

MemoryStream ms = new MemoryStream();

pictureBox2.Image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);

byte[] photo_aray = new byte[ms.Length];

ms.Position = 0;

ms.Read(photo_aray, 0, photo_aray.Length);

please help to find a solution

 

thanks