SortedDictionary<'TKey, 'TValue>.IDictionary.Contains Method (Object)
Determines whether the IDictionary contains an element with the specified key.
Assembly: System (in System.dll)
private abstract Contains : key:Object -> bool private override Contains : key:Object -> bool
Parameters
- key
-
Type:
System.Object
The key to locate in the IDictionary.
Return Value
Type: System.Booleantrue if the IDictionary contains an element with the key; otherwise, false.
Implements
IDictionary.Contains(Object)| Exception | Condition |
|---|---|
| ArgumentNullException | key is null. |
This method returns false if key is of a type that is not assignable to the key type TKey of the SortedDictionary<'TKey, 'TValue>.
This method is an O(log n) operation, where n is Count.
The following code example shows how to use the IDictionary.Contains method of the System.Collections.IDictionary interface with a SortedDictionary<'TKey, 'TValue>. The example demonstrates that the method returns false if a key of the wrong data type is supplied.
The code example is part of a larger example, including output, provided for the IDictionary.Add method.
Available since 8
.NET Framework
Available since 2.0
Portable Class Library
Supported in: portable .NET platforms
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1