| Overload | Description |
|---|---|
| GetOrAdd(TKey,TValue) | Adds a key/value pair to the IDictionary if the key does not already exist. |
| GetOrAdd(TKey,Converter<TKey,TValue>) | Adds a key/value pair to the IDictionary if the key does not already exist. |
Target Platforms: Windows XP, Windows Server 2003, Windows Vista, Windows Server 2008, Windows 7