Insert, Update, Delete query using LINQ in datagridview (c#)

Need code for Insert, Update, Delete query using LINQ in datagridview in C# Windows Programming?

Scenario: There is following controls in the form:
datagridview, textbox1, textbox2, button(save,edit,update,delete)

1.By clicking on save button, data should be updated into datagridview at run-time.
2.By selecting complete row and clicking on edit button, data should be retrieved into textboxes.
3.By clicking on Update button, that data should be updated.
4.By selecting a complete row, the row should be deleted.