public DecreaseFontSizeCommand(EntryNotesViewModel parent)
            {
                if (parent == null)
                    throw new ArgumentNullException("parent");

                _parent = parent;
                Label = "decrease";
                Icon = new SymbolIcon(Symbol.FontDecrease);

                UpdateState();
            }
            public DecreaseFontSizeCommand(EntryNotesViewModel parent)
            {
                if (parent == null)
                {
                    throw new ArgumentNullException("parent");
                }

                _parent = parent;
                Label   = "decrease";
                Icon    = new SymbolIcon(Symbol.FontDecrease);

                UpdateState();
            }