Mike Liu is a Microsoft Certified Solution Developer (MCSD) for both .NET and Visual Studio 6.0, and a Sun Certified Java Programmer. He has over two decade's software development experience in several countries for various domains. Mike started using C# for production development back in the year 2001 when C# was still in Beta stage. He has authored a few books in Unix and Windows operating systems, with the latest one, Advanced C# Programming, being published in 2003. Mike Liu holds a Master's degree in software engineering from Brandeis University. He is currently working as a Principal Software Engineer for a national student loan guarantor company in the United States, responsible for architecting, designing, developing and maintaining technical application architecture for the company. He is the lead for the SOA implementation team in the company, and has been involved in many aspects of the SOA realization projects including WCF and LINQ preparation, BPM selection, and ESB product evaluation.