ASP .Net WebForms DI does it really work?

///This example demonstrates why DI doesn't properly work with ASP .Net WebForms
///Based on https://blogs.msdn.microsoft.com/webdev/2016/10/19/modern-asp-net-web-forms-development-dependency-injection/
void Main()
{
	// ASP .Net creates a GeneratedPage
	var page = new GeneratedPage();
	
	//Glue code to inspect this object
	var pageType = page.GetType().BaseType;
	  
	  // Determine if there is a constructor to inject, and grab it
	   
	 var ctor = (from c in pageType.GetConstructors()
	              where c.GetParameters().Length > 0
	              select c).FirstOrDefault();


	//Invoke ctor and injected dependencies
	ctor.Invoke(page, new [] { new Repository() });
	
	
	//what's my output now?
	page.GetMyState()
		//.Dump() 
		; 

//This is it
/*

I'm created by the framework in the BasePage
I'm created by the framework in the Edit Page.
I'm created by the framework, now I am the GeneratedPage type.
 I'm I building this part again? I'm I called via a reflection API?
I'm created by the framework in the BasePage
Oh my, I'm injected with this UserQuery+Repository from a IoC container!

*/
	
}



public class Repository
{
	public Repository() 
	{
	}
}

//most applications have a BasePage, there are even libraries that provide a BasePage to hook for the page life cycle
public class BasePage
{
	protected string state;
	//This will be called a second time with ctor.Invoke.
	//First time was called by the ASP .Net WebForms framework when GeneratedPage has been initialized.
	//This is another reason why MVC and other frameworks provide access points to delegate the GeneratedPage 
	//creation to an IoC Container and not to work with an already created instance.
	protected BasePage()
	{
		if (state != null && state.Contains("BasePage")) 
		{
			state += "\n I'm I building this part again? I'm I called via a reflection API?";
		}
		
		state += "\nI'm created by the framework in the BasePage";

	}
}


public class EditPage : BasePage
{
	public EditPage(Repository repository)
	{
		state += $"\nOh my, I'm injected with this {repository} from a IoC container!";
	}
	
	protected EditPage()
	{
		state += "\nI'm created by the framework in the Edit Page.";
	}	
	
	public string GetMyState()
	{
		return state;
	}
}


public class GeneratedPage : EditPage
{
	public GeneratedPage()
	{
		state +=  "\nI'm created by the framework, now I am the GeneratedPage type.";
	}
}