Mihail Mateev is a senior software development engineer in Infragistics Inc. He worked as a Software developer and team leader on WPF and Silverlight Line of Business production lines of the company. Now he works like a Technical evangelist in the Infragistics. Mihail is also a consultant for the products of Infragistics, related to Visual Studio LightSwitch . Mihail worked in various areas related to technology with Microsoft: Silverlight, WPF, Windows Phone 7, Visual Studio LightSwitch, WCF RIA Services, MS SQL Server and Windows Azure. Mihail did presentations for .Net and Silverlight user groups in Bulgaria. Mihail holds Master's degrees in Structural Engineering and Applied Mathematics and Informatics. Over the past ten years, Mihail has written articles for Bulgarian Computer World magazine and blogs about .Net technologies. He is a contributor to "Professional Silverlight 4 (Willey)" and a reviewer of "Developing Business Applications with Visual Studio LightSwitch" (PACKT Publishing).