This error cropped up when converting a solution from .NET 2 to .NET 4. Just add
using System.Linq;
Friday, July 8, 2011
Error: List<> does not contain a definition for 'Sum'
Error 'System.Collections.Generic.List<>' does not contain a definition for 'Sum' and no extension method 'Sum' accepting a first argument of type 'System.Collections.Generic.List<>' could be found (are you missing a using directive or an assembly reference?)
This error cropped up when converting a solution from .NET 2 to .NET 4. Just add
This error cropped up when converting a solution from .NET 2 to .NET 4. Just add
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