Any(TSource) Method (IEnumerable(TSource))

Enumerable.Any<TSource> Method (IEnumerable<TSource>)


Determines whether a sequence contains any elements.

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

public static bool Any<TSource>(
	this IEnumerable<TSource> source


Type: System.Collections.Generic.IEnumerable<TSource>

The IEnumerable<T> to check for emptiness.

Return Value

Type: System.Boolean

true if the source sequence contains any elements; otherwise, false.

Type Parameters


The type of the elements of source.

Exception Condition

source is null.


This method does not return any one element of a collection. Instead, it determines whether the collection contains any elements.

The enumeration of source is stopped as soon as the result can be determined.

In Visual Basic query expression syntax, an Aggregate Into Any() clause translates to an invocation of Any.

The following code example demonstrates how to use Any<TSource> to determine whether a sequence contains any elements.

List<int> numbers = new List<int> { 1, 2 };
bool hasElements = numbers.Any();

Console.WriteLine("The list {0} empty.",
    hasElements ? "is not" : "is");

// This code produces the following output:
// The list is not empty. 

The Boolean value that the Any<TSource>(IEnumerable<TSource>) method returns is typically used in the predicate of a where clause (Where clause in Visual Basic) or a direct call to the Where<TSource>(IEnumerable<TSource>, Func<TSource, Boolean>) method. The following example demonstrates this use of the Any method.

class Pet
    public string Name { get; set; }
    public int Age { get; set; }
class Person
    public string LastName { get; set; }
    public Pet[] Pets { get; set; }

public static void AnyEx2()
    List<Person> people = new List<Person>
        { new Person { LastName = "Haas",
                       Pets = new Pet[] { new Pet { Name="Barley", Age=10 },
                                          new Pet { Name="Boots", Age=14 },
                                          new Pet { Name="Whiskers", Age=6 }}},
          new Person { LastName = "Fakhouri",
                       Pets = new Pet[] { new Pet { Name = "Snowball", Age = 1}}},
          new Person { LastName = "Antebi",
                       Pets = new Pet[] { }},
          new Person { LastName = "Philips",
                       Pets = new Pet[] { new Pet { Name = "Sweetie", Age = 2},
                                          new Pet { Name = "Rover", Age = 13}} }

    // Determine which people have a non-empty Pet array.
    IEnumerable<string> names = from person in people
                                where person.Pets.Any()
                                select person.LastName;

    foreach (string name in names)

    /* This code produces the following output:


Universal Windows Platform
Available since 4.5
.NET Framework
Available since 3.5
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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