WITH#. How to add a button to a form from code?

Question

.NET

How to add a button to a form from code? Not through xaml or handles.
Is there something to be passed to MainWindow()?

using System.Windows;
using System.Windows.Controls;

namespace Test1
{
    public partial class MainWindow : Window
    {
        public myButtonClass ttt = new myButtonClass();
        public MainWindow()
        {
            InitializeComponent();
            // как вывести кнопку ttt на форму???
        }
    }
   
public class myButtonClass
    {
        public Button newButton;
        public myButtonClass()
        {
            newButton = new Button();
            newButton.Content = "press me";
            newButton.Height = 50;
            newButton.Width = 50;
            newButton.Margin = new Thickness(50, 50, 0, 0);
            newButton.IsEnabled = true;
          }    
    }
}

Answer 1

This is not a "form", this is a window, in order to add a button to it, you need to contact the container (Layout manager) that processes the content (controls) in your window, for example, if it is Grid, then in my opinion this is how the (this.Content as Grid).Children.Add(button);
documentation will tell you more precisely.
Are you sure it's needed? What is the meaning of this "wrapper"? It complicates, in that you still need to pass the context (this) to it, it’s better to do it first directly in the MainWindow.