Enumerable.Contains<TSource> Method (IEnumerable<TSource>, TSource)
Determines whether a sequence contains a specified element by using the default equality comparer.
Assembly: System.Core (in System.Core.dll)
Parameters
- source
-
Type:
System.Collections.Generic.IEnumerable<TSource>
A sequence in which to locate a value.
- value
-
Type:
TSource
The value to locate in the sequence.
Return Value
Type: System.Booleantrue if the source sequence contains an element that has the specified value; otherwise, false.
Type Parameters
- TSource
The type of the elements of source.
| Exception | Condition |
|---|---|
| ArgumentNullException | source is null. |
If the type of source implements ICollection<T>, the Contains method in that implementation is invoked to obtain the result. Otherwise, this method determines whether source contains the specified element.
Enumeration is terminated as soon as a matching element is found.
Elements are compared to the specified value by using the default equality comparer, Default.
The following code example demonstrates how to use Contains<TSource>(IEnumerable<TSource>, TSource) to determine whether an array contains a specific element.
string[] fruits = { "apple", "banana", "mango", "orange", "passionfruit", "grape" }; string fruit = "mango"; bool hasMango = fruits.Contains(fruit); Console.WriteLine( "The array {0} contain '{1}'.", hasMango ? "does" : "does not", fruit); // This code produces the following output: // // The array does contain 'mango'.
Available since 4.5
.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
