C# Expert for chat app development

**I? require someone with prior experience in building C# based? application.** ? I have an application which allows many users to simultaneously text and voice and video chat with each other.? You will be required to build the WMS and WCF and its features as directed. *1. Must have in-depth undestanding of Windows Media Services *2. Must have in-depth understanding of Windows Communication Foundation You will be provided further informtion, once we've seen your qualifications. ** We need you to have these requirements:** Prior experience with text and? voice and? video chat is a requirement in order for you to be considered. Please provide examples of experience.