Contract.Exists<T> Method (IEnumerable<T>, Predicate<T>)

 

Determines whether an element within a collection of elements exists within a function.

Namespace:   System.Diagnostics.Contracts
Assembly:  mscorlib (in mscorlib.dll)

public static bool Exists<T>(
	IEnumerable<T> collection,
	Predicate<T> predicate
)

Parameters

collection
Type: System.Collections.Generic.IEnumerable<T>

The collection from which elements of type T will be drawn to pass to predicate.

predicate
Type: System.Predicate<T>

The function to evaluate for an element in collection.

Return Value

Type: System.Boolean

true if and only if predicate returns true for any element of type T in collection.

Type Parameters

T

The type that is contained in collection.

Exception Condition
ArgumentNullException

collection or predicate is null.

Universal Windows Platform
Available since 8
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 4.0
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1
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