You are developing a Windows Presentation Foundation (WPF) application. The application contains the following code in the code-behind file for an application window. (Line numbers are included for…

You are developing a Windows Presentation Foundation (WPF) application. The application contains the following code in the code-behind file for an application window. (Line numbers are included for reference only.) 01 StackPanel stack = new StackPanel () ; 02 Content = stack; 03 for (int i=0; i<10; i++) 04 { 05 Button btn = new Buttonf(); 06 btn.Name = ((char) ('A' + i)) .ToString (); 07 btn.Content = btn.Name + "says 'Click me' "; 08 09 } You need to ensure that all of the Button controls that are defined in this code segment appear in the application window. Which code segment should you insert at line 08?