XEnumerableFirstOrDefaultTSource Method (IEnumerableTSource, TSource)

Returns the first element of a sequence or the specified default value if the sequence contains no elements.

Namespace: Linq.Extras
Assembly: Linq.Extras (in Linq.Extras.dll) Version: 5.0.0+96a4f4bfed64095342c5df107c1fe1fb95603ee5

Syntax

public static TSource FirstOrDefault<TSource>(
	this IEnumerable<TSource> source,
	TSource defaultValue
)

<ExtensionAttribute>
Public Shared Function FirstOrDefault(Of TSource) ( 
	source As IEnumerable(Of TSource),
	defaultValue As TSource
) As TSource

[<ExtensionAttribute>]
static member FirstOrDefault : 
        source : IEnumerable<'TSource> * 
        defaultValue : 'TSource -> 'TSource

source: Type: System.Collections.GenericIEnumerableTSource
The sequence to return the first element of.
defaultValue: Type: TSource
The default value to return if the sequence is empty.

Type: TSource
defaultValue if source is empty; otherwise, the first element in source.

In Visual Basic and C#, you can call this method as an instance method on any object of type IEnumerableTSource. 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).