[This topic is pre-release documentation and is subject to change in future releases. Blank topics are included as placeholders.]
Assembly: NEsper (in NEsper.dll)
Determines whether the IDictionary<(Of TKey, TValue>) contains an element with the specified key.
Namespace: net.esper.compat
Assembly: NEsper (in NEsper.dll)
Syntax
Visual Basic (Declaration) |
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Public Function ContainsKey ( _ key As K _ ) As Boolean |
C# |
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public bool ContainsKey ( K key ) |
Visual C++ |
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public: virtual bool ContainsKey ( K key ) sealed |
Parameters
- key
- K type parameter of net.esper.compat.ETreeDictionary<(Of K, V>).
The key to locate in the IDictionary<(Of TKey, TValue>).
Return Value
true if the IDictionary<(Of TKey, TValue>) contains an element with the key; otherwise, false.
Exceptions
Exception | Condition |
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System.ArgumentNullException | key is null. |