public static BinarySize Sum<TSource>(
	this IEnumerable<TSource> source,
	Func<TSource, BinarySize> selector
)
<ExtensionAttribute>
Public Shared Function Sum(Of TSource) ( 
	source As IEnumerable(Of TSource),
	selector As Func(Of TSource, BinarySize)
) As BinarySizepublic:
[ExtensionAttribute]
generic<typename TSource>
static BinarySize Sum(
	IEnumerable<TSource>^ source, 
	Func<TSource, BinarySize>^ selector
)[<ExtensionAttribute>]
static member Sum : 
        source : IEnumerable<'TSource> * 
        selector : Func<'TSource, BinarySize> -> BinarySize This method returns zero if source contains no elements.
| ArgumentNullException | source or selector is . | 
| OverflowException | The sum is larger than BinarySizeMaxValue. |