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MSDN Library

Queryable.Last(TSource) Method (IQueryable(TSource))

Returns the last element in a sequence.

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

static member Last : 
        source:IQueryable<'TSource> -> 'TSource 

Type Parameters

TSource

The type of the elements of source.

Parameters

source
Type: System.Linq.IQueryable(TSource)

An IQueryable(T) to return the last element of.

Return Value

Type: TSource
The value at the last position in source.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IQueryable(TSource). 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).

InvalidOperationException

The source sequence is empty.

The Last(TSource)(IQueryable(TSource)) method generates a MethodCallExpression that represents calling Last(TSource)(IQueryable(TSource)) itself as a constructed generic method. 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 Last(TSource)(IQueryable(TSource)) depends on the implementation of the type of the source parameter. The expected behavior is that it returns the last element in source.

The following code example demonstrates how to use Last(TSource)(IQueryable(TSource)) to return the last element of an array.

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

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Portable Class Library

Supported in: Portable Class Library
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