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

Returns the last element of a sequence that satisfies a specified condition.

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

static member Last : 
        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
The last element in the sequence that passes the test in the specified 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).

InvalidOperationException

No element satisfies the condition in predicate.

-or-

The source sequence is empty.

The Last(TSource)(IEnumerable(TSource), Func(TSource, Boolean)) method throws an exception if no matching element is found in source. To instead return a default value when no matching element is found, use the LastOrDefault method.

The following code example demonstrates how to use Last(TSource)(IEnumerable(TSource), Func(TSource, Boolean)) to return the last element of an array that satisfies a condition.

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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