Returns the expression for the receiver.
Original signature is '- (NSExpression *)expression'
Available in Mac OS X v10.6 and later.

C# | Visual Basic | Visual C++ |
public virtual NSExpression Expression { get; set; }
Public Overridable Property Expression As NSExpression Get Set
public: virtual property NSExpression^ Expression { NSExpression^ get (); void set (NSExpression^ value); }

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