Queryable::Average Method (IQueryable<Nullable<Int64>>^)
Computes the average of a sequence of nullable Int64 values.
Assembly: System.Core (in System.Core.dll)
public: [ExtensionAttribute] static Nullable<double> Average( IQueryable<Nullable<long long>>^ source )
Parameters
- source
-
Type:
System.Linq::IQueryable<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 null if the source sequence is empty or contains only null values.
| Exception | Condition |
|---|---|
| ArgumentNullException | source is null. |
The Average(IQueryable<Nullable<Int64>>^) method generates a MethodCallExpression that represents calling Average(IQueryable<Nullable<Int64>>^) itself. It then passes the MethodCallExpression to the Execute<TResult>(Expression^) method of the IQueryProvider represented by the Provider property of the source parameter.
The query behavior that occurs as a result of executing an expression tree that represents calling Average(IQueryable<Nullable<Int64>>^) depends on the implementation of the type of the source parameter. The expected behavior is that it calculates the average of the values in source.
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 7.1
Windows Phone
Available since 8.1