Bindable Converter, Converter Parameter and StringFormat

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;

namespace BindableConverterParameter
{
    public class MyModelView : DependencyObject 
    {
        public MyModelView()
        {
            FirstName = "John";
            ConcatSign = "-";
        }

        public String FirstName
        {
            get { return (String)GetValue(FirstNameProperty); }
            set { SetValue(FirstNameProperty, value); }
        }

        // Using a DependencyProperty as the backing store for FirstName.  This enables animation, styling, binding, etc...
        public static readonly DependencyProperty FirstNameProperty =
            DependencyProperty.Register("FirstName", typeof(String), typeof(MyModelView), new UIPropertyMetadata("John"));



        public String ConcatSign
        {
            get { return (String)GetValue(ConcatSignProperty); }
            set { SetValue(ConcatSignProperty, value); }
        }

        // Using a DependencyProperty as the backing store for ConcatSign.  This enables animation, styling, binding, etc...
        public static readonly DependencyProperty ConcatSignProperty =
            DependencyProperty.Register("ConcatSign", typeof(String), typeof(MyModelView), new UIPropertyMetadata("-"));

    }
}