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c# - Datagridview forcing only one checkbox to be selected in a column

How do I force only a single checkbox to be checked in a column of a Datagridview?

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 private void grdRegClass_CellContentClick(object sender, DataGridViewCellEventArgs e)
    {
        if (grdRegClass.Columns.IndexOf(grdRegClass.Columns["Status"]) == e.ColumnIndex)
        {
            int currentcolumnclicked = e.ColumnIndex;
            int currentrowclicked = e.RowIndex;
            foreach (DataGridViewRow dr in grdRegClass.Rows)
            {
                dr.Cells[currentcolumnclicked].Value = false;
            }
            grdRegClass.CurrentRow.Cells[currentrowclicked].Value = true;  
        }
    }

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