You should be able to programmatically bind an existing column that has the same binding property path.  See below sample.

private void AddColumn(string pPropertyPath, string text) {

      ViewDescriptor vd = new ViewDescriptor(typeof(Customer), pPropertyPath);

      DataGridViewBindingDescriptor dgvbd = dataGridViewBindingManager1.Descriptors.Add(vd);

      dgvbd.Column.HeaderText = text;

    }

However, if the column is not bound or it is bound to a different property path, the “dataGridViewBindingManager1.Descriptors.Add” call will add a new column instead.

If there is another column that is also bound to the same property path and it has a valid ViewDescriptor, DF will also add a new column and ViewDescriptor.

Jason