WPF C#

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    x:Class="ElemCollMethods.Pane1"
    WindowTitle="UI Element Collection Methods Sample">
 
    UI Element Collection - Methods
    
        
            Add Control
        
    

    

 

//File:Window.xaml.cs
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Windows.Data;
using System.Windows.Input;
namespace ElemCollMethods
{
  public partial class Pane1 : Page
  {
    System.Windows.Controls.Button btn, btn1, btn2, btn3;
    void AddButton(object sender, MouseButtonEventArgs e)
    {
      sp1.Children.Clear();
      btn = new Button();
      btn.Content = "New Button";
      sp1.Children.Add(btn);
    }
  }
}