Convert tnef to xaml

What is the difference between .tnef and .xaml?

Name: Transport Neutral Encapsulation Format; Extensible Application Markup Language Format

Description: File generated by Microsoft Exchange email programs such as Outlook; appears as an email attachment for email clients that don't recognize Microsoft's proprietary TNEF format; may cause the text "application/ms-tnef" to appear in the email if the email client does not recognize Microsoft Exchange formatting.; Extensible Application Markup Language file that uses Windows Presentation Foundation (WPF) code; XAML (pronounced "zammel") is a descriptive programming language developed by Microsoft for creating user interfaces; introduced during the development stages of Longhorn, which is now Windows Vista.