BindingSample / DynamicBindingWpf / MainWindow

AppModel.cs

using System;

namespace DynamicBindingWpf
{
    public class AppModel
    {
        public dynamic TextModel { get; } = new TextModel().ToDynamicSyncProxy(300);
    }

    public class TextModel
    {
        string _Input;

        public string Input
        {
            get { return _Input; }
            set
            {
                _Input = value;
                Output = _Input?.ToUpper();
            }
        }

        public string Output { get; private set; }
    }
}

MainWindow.xaml

<Window x:Class="DynamicBindingWpf.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:DynamicBindingWpf"
        Title="Dynamic Binding" Height="400" Width="600" FontSize="36">
    <Window.DataContext>
        <local:AppModel/>
    </Window.DataContext>
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition/>
            <RowDefinition/>
        </Grid.RowDefinitions>
        <TextBox Text="{Binding TextModel.Input, UpdateSourceTrigger=PropertyChanged}" TextWrapping="Wrap"/>
        <TextBlock Text="{Binding TextModel.Output}" TextWrapping="Wrap" Grid.Row="1"/>
    </Grid>
</Window>