C#
VB
C++
Determines whether the IDictionary contains an element with the specified key.
public virtual bool ContainsKey(TKey key)
public:virtual bool ContainsKey(_TKey^_ key)
key
The key to locate in the IDictionary.
true if the IDictionary contains an element with the key; otherwise, false.
Exceptions
| Exception | Description | 
|---|---|
| System.ArgumentNullException | key is null. | 
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