How to get control of outlook email body of newly creating mail dynamically in c# -

i creating addin. want control of email body in c# write on body part can send through server side.

this want :

outlook.application application = globals.thisaddin.application;

outlook.inspector inspector = application.activeinspector();

outlook.mailitem mymailitem = (outlook.mailitem)inspector.currentitem;

string subjectemail = mymailitem.subject;

string bodyemail = mymailitem.body;