remove item gridView1 and gridView2 error Deleted row information cannot be access ?

[dong]

Remove item gridView1 and gridView2 error Deleted row information cannot be accessed through the row ?

I use nested while command, to run two gridView1 and gridView1 if gridView1 record is equal to gridView1 record, delete them, but when running, I get an error: "Deleted row information cannot be accessed through the row"

private void cmdSSLoaiTru_Click(object sender, EventArgs e)
        {
            
             while (x2 < gridView2.DataRowCount) //Gv.DataRowCount //Gv.RowCount
             {
                 gridView2.SelectRow(x2);
                 DataRow row2 = gridView2.GetDataRow(gridView2.GetVisibleRowHandle(x2));
                 while (x1 < gridView1.DataRowCount && bStop == true) //Gv.DataRowCount //Gv.RowCount
                 {
                     gridView1.SelectRow(x1);
                     DataRow row1 = gridView1.GetDataRow(x1);//.GetDataRow(gridView1.GetVisibleRowHandle(x1));                      
                     if ((row2["HD"].ToString() == row1["HD"].ToString()) && (row2["SLUONG"].ToString() == row1["SLUONG"].ToString()) && (row2["DONGIA"].ToString() == row1["DONGIA"].ToString())) //error here
                     {
                         gridView1.DeleteRow(x1);
                         gridView2.DeleteRow(x2);
                     }
                     x1++;
                 }
                 x2++;
                 x1 = 0;
             }

[Niya]

Your inner loop is deleting the current row selected by the outer loop yet you haven't exited the inner loop so it's continuing to loop while trying to compare to the deleted row.

[dong]

Thank you for answering my question