Add MS Outlook signature programmatically in C# using Mail class

Question

Hello! I am currently using Mail class in my program. Is there any way on how to get the signature that is currently being set in my Outlook and add it to my program, particularly to the HtmlBody? Thanks!
Just to make it clear.  I want to get the signature that is being set in MS Outlook's Tools > Options > Mail Format > Signature for new messages. It could be found on any directories.
Because when I click a button in my program, what it should do is to automatically open the MS Outlook, however it doesn't show the signature that I have.