Getting GridViewRow Value on Button Click Event

public void User_Click_detail(object sender, EventArgs e)
 {
 LinkButton LB = (LinkButton)sender;
 GridViewRow Grid1 = (GridViewRow)LB.NamingContainer;
... int indexid = Convert.ToInt32((GridView1.DataKeys[Grid1.RowIndex].Values[0].ToString()));
//perform CRUD on based on indexid value
}