Setting Forecolor of PropertyGrid

class MyBackGround // Sample Class for custom binding
    {
        private SolidColorBrush backgroundBrush = null;

        public MyBackGround()
        {
            backgroundBrush = new SolidColorBrush(Colors.Black);
        }

        public SolidColorBrush BackgroundColor
        {
            set { backgroundBrush = value; }
            get { return backgroundBrush; }
        }
    }

SolidColorBrush redBrush = new SolidColorBrush(Colors.Red);
SolidColorBrush blackBrush = new SolidColorBrush(Colors.Black);
MyBackGround myback = new MyBackGround(); // For Sample it is a class member.
private void Init() // My Init Function
        {
            Binding backGroundBinding = new Binding("BackgroundColor");
            backGroundBinding.Source = myback;

            DataTemplate dataTemplate = new DataTemplate();
            FrameworkElementFactory testFec = new FrameworkElementFactory(typeof(TextBox));
            testFec.SetBinding(TextBox.TextProperty, new Binding("Value") { RelativeSource = new RelativeSource() { AncestorType = typeof(IPropertyDataAccessor) } });
            testFec.SetBinding(TextBox.ForegroundProperty, backGroundBinding);
            dataTemplate.VisualTree = testFec;

            PropertyGridPropertyItem item = new PropertyGridPropertyItem();
            item.DisplayName = "Test Property";
            item.Description = "Description of test";
            item.Category = "General Properties";
            item.ValueTemplate = dataTemplate;
            item.PropertyChanged += new System.ComponentModel.PropertyChangedEventHandler(item_PropertyChanged);
            item.Value = "Maulik";
            item.ValueName = "testBackG";
            this.propGrid.Properties.Add(item); // Add it.
        }

        void item_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
        {
            if (e.PropertyName != "Value")
            {
                return;
            }
            if (propGrid.Properties.Count <= 0)
                return;

            PropertyGridPropertyItem propItem = (PropertyGridPropertyItem)sender;
            if (propItem.ValueName == "testBackG")
            {
                if ((bool)propItem.IsModified)
                {
                    myback.BackgroundColor = redBrush;
                    propGrid.Refresh(); // IF We comment it, the effect is not coming.
                }
            }
        }