| Overload | Description | 
|---|---|
| TryUpdate(TKey,TValue) | Updates an element with the provided key to the value if it exists. | 
| TryUpdate(TKey,TValue,TValue) | Updates an element with the provided key to the value if it exists. | 
| TryUpdate(TKey,KeyValueUpdate<TKey,TValue>) | Modify the value associated with the result of the provided update method as an atomic operation, Allows for reading/writing a single record within the syncronization lock. | 
Target Platforms: Windows XP, Windows Server 2003, Windows Vista, Windows Server 2008, Windows 7