Add Rect from another class in c#

Question

I want to draw a rect from another class in c# into my mainWindow

<Window x:Class="MyApp.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Name="mainWindow" Height="768" Width="1366" >
</Window>

Here is my Class code snippet which I tried to draw a rect to mainWindow

private UIElement container;

private Rect rect1 = new Rect();

public TestPage(UIElement cont) 
{        
    this.container = cont;
}

private void init()
{
    this.container.Children.Add(rect1);
}

How to handle it?

Answer 1

一个窗口只能有一个内容，因此您必须设置窗口的Content属性。