Make WPF on .net core always have an exposed entrypoint?

*Copied from https://github.com/dotnet/core/issues/2045*

AFAIK `App.Xaml` hide the entry-point in WPF .
Could the template of WPF always has the `public static void Main()` entry-point (Do not generate a entrypoint for `App.Xaml`)?
```C#
public static void Main(string[] args)
{
var app = new MyApp.App();
//app.InitializeComponent(); call this in App's constructor
app.Run();
}
```
this will let developer know how Xaml app start, and customize app start easily (control start as command line app or UI app).