private void Dgrid1_CellLeave(object sender, DataGridViewCellEventArgs e)
 {
     if (Flag == true)
     {
         Dgrid1.ClearSelection();
         Dgrid1.Rows[2].Cells[2].Selected = true;
     }
 }
 private void btnLimpiar_Click(object sender, EventArgs e)
 {
     Dgrid1.ClearSelection();
     Dgrid1.Rows[2].Cells[1].Selected = true;
 }