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)
static member Sum<'TSource> : source:IEnumerable<'TSource> * selector:Func<'TSource, float> -> float
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 8
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