Try to introduce and use the System.Windows.Window or System.Windows.Application
classes into the global namespace with a using statement:
Example:
using System.Windows;
class MyWindow : Window
{
}
Example:
using Application = System.Windows.Application;
class MyApp: Application
{
}
Observe how these examples fail to compile due to naming conflicts. Since these
class names are defined in the global namespace, the only way to resolve this
issue is through the awkward namespace alias feature in C# | 
