如何使用MVVM和MVVM工具包将属性绑定到文本框？

I am new to MVVM. to learn I created a sample application to show a message in a text box while clicking on button. In my code the button command is working properly but the property is not binding to the Textbox. How to bind Property to Textbox using MVVM? I am new to MVVM. to learn I created a sample a