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Enumerable.LastOrDefault(TSource) Method (IEnumerable(TSource), Func(TSource, Boolean))

Returns the last element of a sequence that satisfies a condition or a default value if no such element is found.

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

static member LastOrDefault : 
        source:IEnumerable<'TSource> * 
        predicate:Func<'TSource, bool> -> 'TSource 

Type Parameters

TSource

The type of the elements of source.

Parameters

source
Type: System.Collections.Generic.IEnumerable(TSource)

An IEnumerable(T) to return an element from.

predicate
Type: System.Func(TSource, Boolean)

A function to test each element for a condition.

Return Value

Type: TSource
default(TSource) if the sequence is empty or if no elements pass the test in the predicate function; otherwise, the last element that passes the test in the predicate function.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IEnumerable(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 or predicate is a null reference (Nothing in Visual Basic).

The default value for reference and nullable types is a null reference (Nothing in Visual Basic).

The following code example demonstrates how to use LastOrDefault(TSource)(IEnumerable(TSource), Func(TSource, Boolean)) by passing in a predicate. In the second call to the method, there is no element in the sequence that satisfies the condition.

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

.NET Framework

Supported in: 4.5, 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

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

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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