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Enumerable.Average Method (IEnumerable(Nullable(Int64)))

Computes the average of a sequence of nullable Int64 values.

Namespace:  System.Linq
Assemblies:   System.Linq (in System.Linq.dll)
  System.Core (in System.Core.dll)

static member Average : 
        source:IEnumerable<Nullable<int64>> -> Nullable<float> 

Parameters

source
Type: System.Collections.Generic.IEnumerable(Nullable(Int64))

A sequence of nullable Int64 values to calculate the average of.

Return Value

Type: System.Nullable(Double)
The average of the sequence of values, or a null reference (Nothing in Visual Basic) if the source sequence is empty or contains only values that are a null reference (Nothing in Visual Basic).

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IEnumerable(Nullable(Int64)). When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).

ExceptionCondition
ArgumentNullException

source is a null reference (Nothing in Visual Basic).

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(IEnumerable(Nullable(Int64))) to calculate an average.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0

Portable Class Library

Supported in: Portable Class Library

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8
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