Enumerable::Sum<TSource> Method (IEnumerable<TSource>^, Func<TSource, Double>^)
Computes the sum of the sequence of Double values that are obtained by invoking a transform function on each element of the input sequence.
Assembly: System.Core (in System.Core.dll)
public: generic<typename TSource> [ExtensionAttribute] static double Sum( IEnumerable<TSource>^ source, Func<TSource, double>^ selector )
A sequence of values that are used to calculate a sum.
Return ValueType: System::Double
The sum of the projected values.
The type of the elements of source.
This method returns zero if source contains no elements.
You can apply this method to a sequence of arbitrary values if you provide a function, selector, that projects the members of source into a numeric type, specifically Double.
In Visual Basic query expression syntax, an Aggregate Into Sum() clause translates to an invocation of Sum.
Available since 4.5
Available since 3.5
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Available since 8.1