Returns the value for the property identified by a given key.
Original signature is '- (id)valueForKey:(NSString *)key'
Available in Mac OS X v10.0 and later.


- key (NSString)
- The name of one of the receiver's properties.

The value for the property identified by key.

- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)