Enumerable.Average<TSource> Method (IEnumerable<TSource>, Func<TSource, Int64>)
.NET Framework (current version)
Computes the average of a sequence of Int64 values that are obtained by invoking a transform function on each element of the input sequence.
Assembly: System.Core (in System.Core.dll)
public static double Average<TSource>( this IEnumerable<TSource> source, Func<TSource, long> selector )
Parameters
- source
-
Type:
System.Collections.Generic.IEnumerable<TSource>
A sequence of values to calculate the average of.
- selector
-
Type:
System.Func<TSource, Int64>
A transform function to apply to each element.
Type Parameters
- TSource
The type of the elements of source.
| Exception | Condition |
|---|---|
| ArgumentNullException | source or selector is null. |
| InvalidOperationException | source contains no elements. |
| OverflowException | The sum of the elements in the sequence is larger than MaxValue. |
In Visual Basic query expression syntax, an Aggregate Into Average() clause translates to an invocation of Average.
The following code example demonstrates how to use Average<TSource>(IEnumerable<TSource>, Func<TSource, Int64>) to calculate an average.
Universal Windows Platform
Available since 8
.NET Framework
Available since 3.5
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
Available since 8
.NET Framework
Available since 3.5
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
Show: