Queryable.First(Of TSource) Method (IQueryable(Of TSource))
Returns the first element of a sequence.
Assembly: System.Core (in System.Core.dll)
<ExtensionAttribute> Public Shared Function First(Of TSource) ( source As IQueryable(Of TSource) ) As TSource
The first element in source.
The type of the elements of source.
The MethodCallExpression that represents calling itself as a constructed generic method. It then passes the MethodCallExpression to the Execute(Of TResult)(Expression) method of the IQueryProvider represented by the Provider property of the source parameter.method generates a
The query behavior that occurs as a result of executing an expression tree that represents callingdepends on the implementation of the type of the source parameter. The expected behavior is that it returns the first element in source.
The following code example demonstrates how to useto return the first element in a sequence.
Available since 4.5
Available since 3.5
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.1
Available since 8.1