How to implement add delete modify functionality in datagridview?

I propose one solution to this for every control and not only for datagridview

you create a BindingSource object and configure it to your data source

then

yourcontrol.Databinding.add("thepropertyname like Text or DataSource ",
                                              bindingsource_instance,
                                              "The source like a given data table for example "
);

This provides a binding in two directions, if I well undersood the problem

i did this but when i am changing some value in grid how to reflect it in database.
means if i delete any row from grid same should happen with database...
right now i am implementing this by writing sql query with sqlcommand & sqlconnection string. but what i want to do is implement add delete in grid itself..

thnx,

At the right top of grid if you put the mouse pointer on that angle then a small snippet appears "small dark triangle within a small square " then clickit and a figure will appear to invite you what functionality what do you want to enable/disable at the datagrid it self