WPF单行文本两端对齐

    public partial class UC_TextBlockJustify : UserControl
    {

        public double fontSize
        {
            get { return (double)GetValue(fontSizeProperty); }
            set { SetValue(fontSizeProperty, value); }
        }

        // Using a DependencyProperty as the backing store for fontSize.  This enables animation, styling, binding, etc...
        public static readonly DependencyProperty fontSizeProperty =
            DependencyProperty.Register("fontSize", typeof(double), typeof(UC_TextBlockJustify));



        public Brush foreground
        {
            get { return (Brush)GetValue(foregroundProperty); }
            set { SetValue(foregroundProperty, value); }
        }

        // Using a DependencyProperty as the backing store for foreground.  This enables animation, styling, binding, etc...
        public static readonly DependencyProperty foregroundProperty =
            DependencyProperty.Register("foreground", typeof(Brush), typeof(UC_TextBlockJustify));



        public FontFamily fontFamily
        {
            get { return (FontFamily)GetValue(fontFamilyProperty); }