LINQ Pivot with dynamic columns

I'm trying to create a Pivot using LINQ with dynamic columns. I have created a Pivot in SQL Server where you do not know which columns are going to get used. But don't know how to transfer 开发者_开发技巧that into LINQ. Does anyone have links for me to get started on?

Cheers

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    List<CustData> myList = GetCustData();

    var query = myList
        .GroupBy(c => c.CustId)
        .Select(g => new {
            CustId = g.Key,
            Jan = g.Where(c => c.OrderDate.Month == 1).Sum(c => c.Qty),
            Feb = g.Where(c => c.OrderDate.Month == 2).Sum(c => c.Qty),
            March = g.Where(c => c.OrderDate.Month == 3).Sum(c => c.Qty)
        });

this is the answer from David B in this url