How to make my datagridview worthy?

Question

HI,
        I want three option(add,delete,update) in my datagridview within the grid itself how would i do it in c# windows application.

editing i must do by editing directly on to the grid itself.
deleting i can use my way which i am using delete image column.
adding also i must do by directly adding it to the gird.


Thanks a ton in advance.