 | RankedDictionaryTKey, TValueContainsKey Method |
Determines whether the dictionary contains the supplied key.
Namespace: Kaos.Collections
Assembly: KaosCollections (in KaosCollections.dll) Version: 4.2.0.0
SyntaxC#
public bool ContainsKey( TKey key )
Parameters
- key
- Type: TKey
The key to locate.
Return Value
Type: Booleantrue if key is contained in the dictionary; otherwise false.
Implements
IDictionaryTKey, TValueContainsKey(TKey)IReadOnlyDictionaryTKey, TValueContainsKey(TKey)
Exceptions| Exception | Condition |
|---|---|
| ArgumentNullException | When key is null. |
RemarksThis is a O(log n) operation.
Examples
The below snippet is part of a larger example of the
RankedDictionaryTKey, TValueclass.
C#
// ContainsKey can be used to test keys before inserting them. if (! cc.ContainsKey ("GG")) { cc.Add ("GG", "Guernsey"); Console.WriteLine ($"Value added for key = 'GG': {cc["GG"]}"); }
See Also