Returns the maximum number of top-level undo groups the receiver holds.
Original signature is '- (NSUInteger)levelsOfUndo'
Available in Mac OS X v10.0 and later.

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

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