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