Sequence contains no elements exception in linq without even using Single

Question

I am not using Single in LINQ below, but I am still getting a \'Sequence contains no elements\' exception:

allNames = StockCollection.Where((s)          


        

Answer 1

Using Aggregate(func) on an empty source throws an InvalidOperationException.

See documentation: http://msdn.microsoft.com/en-us/library/bb548651.aspx