ICollection<T>.Contains(T) ICollection<T>.Contains(T) ICollection<T>.Contains(T) ICollection<T>.Contains(T) Method

Definition

Namespace:: System.Collections.Generic System.Collections.Generic System.Collections.Generic System.Collections.Generic

Assemblies:: System.Runtime.dll, mscorlib.dll, netstandard.dll

Determines whether the ICollection<T> contains a specific value.

public:
 bool Contains(T item);

public bool Contains (T item);

abstract member Contains : 'T -> bool

Public Function Contains (item As T) As Boolean

Parameters

item

The object to locate in the ICollection<T>.

Returns

Boolean Boolean Boolean Boolean

true if item is found in the ICollection<T>; otherwise, false.

Remarks

Implementations can vary in how they determine equality of objects; for example, List<T> uses Comparer<T>.Default, whereas Dictionary<TKey,TValue> allows the user to specify the IComparer<T> implementation to use for comparing keys.

Applies to