PropertyCollection.IDictionary.Contains(Object) Method
Definition
Important
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Determines whether the IDictionary object contains an element with the specified key.
virtual bool System.Collections.IDictionary.Contains(System::Object ^ value) = System::Collections::IDictionary::Contains;bool IDictionary.Contains (object value);abstract member System.Collections.IDictionary.Contains : obj -> bool
override this.System.Collections.IDictionary.Contains : obj -> boolFunction Contains (value As Object) As Boolean Implements IDictionary.ContainsParameters
- value
- Object
The key to locate in the IDictionary object.
Returns
true if the IDictionary contains an element with the key; otherwise, false.
Implements
Exceptions
key is null.
Examples
The following example demonstrates how to implement the Contains method. This example is part of a larger example provided for the IDictionary class.
public:
virtual bool Contains(Object^ key)
{
int index;
return TryGetIndexOfKey(key, &index);
}
public bool Contains(object key)
{
Int32 index;
return TryGetIndexOfKey(key, out index);
}
Public Function Contains(ByVal key As Object) As Boolean Implements IDictionary.Contains
Dim index As Integer
Return TryGetIndexOfKey(key, index)
End Function
Applies to
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