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.
Assembly: System.Core (in System.Core.dll)
static member LastOrDefault<'TSource> : source:IEnumerable<'TSource> * predicate:Func<'TSource, bool> -> 'TSource
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: TSourcedefault(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.
Type Parameters
- TSource
The type of the elements of source.
| Exception | Condition |
|---|---|
| ArgumentNullException | source or predicate is null. |
The default value for reference and nullable types is null.
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.
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 7.0
Windows Phone
Available since 8.1