ContentControl.Content-Eigenschaft

<!--Create a Button with a string as its content.--><Button>This is string content of a Button</Button><!--Create a Button with a DateTime object as its content.--><Buttonxmlns:sys="clr-namespace:System;assembly=mscorlib"><sys:DateTime>2004/3/4 13:6:55</sys:DateTime></Button><!--Create a Button with a single UIElement as its content.--><Button><RectangleHeight="40"Width="40"Fill="Blue"/></Button><!--Create a Button with a panel that contains multiple objects 
as its content.--><Button><StackPanel><EllipseHeight="40"Width="40"Fill="Blue"/><TextBlockTextAlignment="Center">Button</TextBlock></StackPanel></Button>

// Create a Button with a string as its content.
Button stringContent = new Button();
stringContent.Content = "This is string content of a Button";

// Create a Button with a DateTime object as its content.
Button objectContent = new Button();
DateTime dateTime1 = new DateTime(2004, 3, 4, 13, 6, 55);

objectContent.Content = dateTime1;

// Create a Button with a single UIElement as its content.
Button uiElementContent = new Button();

Rectangle rect1 = new Rectangle();
rect1.Width = 40;
rect1.Height = 40;
rect1.Fill = Brushes.Blue;
uiElementContent.Content = rect1;

// Create a Button with a panel that contains multiple objects // as its content.
Button panelContent = new Button();
StackPanel stackPanel1 = new StackPanel();
Ellipse ellipse1 = new Ellipse();
TextBlock textBlock1 = new TextBlock();

ellipse1.Width = 40;
ellipse1.Height = 40;
ellipse1.Fill = Brushes.Blue;

textBlock1.TextAlignment = TextAlignment.Center;
textBlock1.Text = "Button";

stackPanel1.Children.Add(ellipse1);
stackPanel1.Children.Add(textBlock1);

panelContent.Content = stackPanel1;