Queryable.Last<TSource> Method (IQueryable<TSource>)
Returns the last element in a sequence.
Assembly: System.Core (in System.Core.dll)
Parameters
- source
-
Type:
System.Linq.IQueryable<TSource>
An IQueryable<T> to return the last element of.
Return Value
Type: TSourceThe value at the last position in source.
Type Parameters
- TSource
The type of the elements of source.
| Exception | Condition |
|---|---|
| ArgumentNullException | source is null. |
| 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.
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