void AddLogicalElement(object sender, RoutedEventArgs e)
{
Button myButton = new Button();
myButton.Content = "Happy birthday! " + System.DateTime.Now.TimeOfDay.ToString();
CustomElement.SetSingleChild(myButton);
}
private void AddLogicalElement(object sender, RoutedEventArgs e)
{
var mybutton = new Button {
Content = "Happy birthday! " + DateTime.Now.TimeOfDay
};
CustomElement.SetSingleChild(mybutton);
}