BindingSample / BindingConsole / ExpandoObject

Program.cs

using System;
using System.Dynamic;
using System.Windows.Controls;
using System.Windows.Data;

namespace BindingConsole
{
    class Program
    {
        [STAThread]
        static void Main(string[] args)
        {
            // Binding Source.
            dynamic person = new ExpandoObject();
            person.Id = 123;
            person.Name = "Taro";

            // Binding Target must be FrameworkElement.
            var textBox = new TextBox { Text = "Default" };
            Console.WriteLine(textBox.Text); // Default

            // Binds target to source.
            var binding = new Binding(nameof(person.Name)) { Source = person, UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged };
            textBox.SetBinding(TextBox.TextProperty, binding);
            Console.WriteLine(textBox.Text); // Taro

            // Changes source value.
            person.Name = "Jiro";
            Console.WriteLine(textBox.Text); // Jiro

            // Changes target value.
            textBox.Text = "Saburo";
            Console.WriteLine(person.Name); // Saburo
        }
    }
}