Digital Signature

Hello team,
I wanted to add digital signature functionality. It is very important for me.
Please help me.
Early feedback is appreciated.
Send me with steps please.

Do you mean certificate or signature took with a pen?

Hello admin,
Please check the attachment, Here tool is allow to add digital signature. I want this functionality in our tool.
Is it possible?..if yes then can you please send me the steps how to add it..
please sir, It is very important for me.

seems you need to:
1. draw all strokes on Canvas when drawing.
2. draw all strokes on Bitmap when finished drawing.
3. invoke Annotation.Sign() method to sign on an empty signature field.
4. you can use Annotation.Verify() to verify is PDF modified.
step 3 and 4 require the library has signature feature.

Great, But can you please share code with me.