Blank Row in DataGridView to insert new row

I have a datagridview in my windows form that show some data from a table in my MS SQL database. I want to disallow users from changing the values of the data, so I made it read-only. But I want to have a blank row at the bottom for users to insert new row of data into the table. The user will just click on a button after filling up the blank row and the row will be inserted. Is there any way that I can do that?

Derive the class datagriew and override edit method.

If the selected row is not the last one return, else call base edit method.