Case insensitive group on multiple columns

Question

Is there anyway to do a LINQ2SQL query doing something similar to this:

var result = source.GroupBy(a => new { a.Column1, a.Column2 });

Answer 1

I had the same issue grouping by the values of DataRow objects from a Table, but I just used .ToString() on the DataRow object to get past the compiler issue, e.g.

MyTable.AsEnumerable().GroupBy(
    dataRow => dataRow["Value"].ToString(),
    StringComparer.InvariantCultureIgnoreCase)

instead of

MyTable.AsEnumerable().GroupBy(
    dataRow => dataRow["Value"],
    StringComparer.InvariantCultureIgnoreCase)