ReadOnlyDictionary<TKey,TValue>.IDictionary.Contains(Object) Method

Reference

Definition

Namespace:: System.Collections.ObjectModel

Assembly:: System.ObjectModel.dll

Assembly:: System.Runtime.dll

Assembly:: mscorlib.dll

Assembly:: netstandard.dll

Source:: ReadOnlyDictionary.cs

Source:: ReadOnlyDictionary.cs

Source:: ReadOnlyDictionary.cs

Important

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Determines whether the dictionary contains an element that has the specified key.

 virtual bool System.Collections.IDictionary.Contains(System::Object ^ key) = System::Collections::IDictionary::Contains;

bool IDictionary.Contains (object key);

abstract member System.Collections.IDictionary.Contains : obj -> bool
override this.System.Collections.IDictionary.Contains : obj -> bool

Function Contains (key As Object) As Boolean Implements IDictionary.Contains

Parameters

key: Object

The key to locate in the dictionary.

Returns

Boolean

true if the dictionary contains an element that has the specified key; otherwise, false.

Implements

Contains(Object)

Exceptions

ArgumentNullException

key is null.

Remarks

This member is an explicit interface member implementation. It can be used only when the ReadOnlyDictionary<TKey,TValue> instance is cast to an IDictionary interface.

Applies to

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