public void AddColumnHeader()
{
var newColumns = GetSelectedProperties()
.Select(pd => new PivotSpec.Column(ColumnId.GetColumnId(pd)).ChangeVisible(false));
PivotSpec = PivotSpec.ChangeColumnHeaders(PivotSpec.ColumnHeaders.Concat(newColumns));
}
private void ColumnHeadersListOnColumnsMoved(IList <int> ints)
{
PivotSpec = PivotSpec.ChangeColumnHeaders(ints.Select(i => PivotSpec.ColumnHeaders[i]));
}