Here is a code for saving an image to SQL database.
First you need to save your image in MemoryStream. Include the namespace System.IO
Create an instance of MemoryStream.
MemoryStream stream = new MemoryStream();
Then save your image in the stream.
Lastly, assign the stream to bytes.
bytes by = stream.ToArray();
The by is now readily available for saving in the database. If you have a column in your data table, the datatype is image, then you can assign by to this column.