Each instance of a type is defined using proper XAML syntax to create an object element in the UI. Each of these object elements starts with a left angular bracket (<) and defines the name of the element. You can optionally prefix the namespace when it is defined outside the default scope. You can use a self-closing angular bracket (/>) or a right angular bracket (>) to close the object element definition. If the object element does not have any child elements, the self-closing angular bracket is used. For example, (<Button Content="Click Here" />) uses a self-closing angular bracket. If you write the same with a child element, it closes with an end tag (<Button>Click Here</Button>,) as shown.
When you define the object element in an XAML page, the instruction to create the instance of the element gets generated and it creates the instance by calling the constructor of the element when you load it in memory.
