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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
)

Type Parameters

T

The type that is contained in collection.

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.

ExceptionCondition
ArgumentNullException

collection or predicate is null.

Silverlight

Supported in: 5, 4

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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