| We have discussed throughout this book many of the architectural benefits provided by OGSA to Web services and grid services communities. Likewise, we have discussed throughout this book the benefits the OGSI specifications provide as a common set of XML messages and definitions using WSDL for interoperable grid service implementations . In the previous chapters, we also learned about the major infrastructure developments for hosting an OGSI-based grid services implementation. Those developments were centered on Java and J2SE/J2EE. In this chapter, we will see other reference implementations of OGSI in Microsoft .NET, another prominent hosting platform. The main value additions of these implementations are to validate the interoperability between services hosted by different environments, and to influence the OGSI communities on interoperable message definitions and standardizations. This will provide a means for a wide range of acceptability advancements for the OGSI standard. There are a number of reference implementations of OGSI in .NET, which are available today. The most prominent reference implementations are: OGSI.NET by the University of Virginia [1] and MS.NETGrid by National eScience Center (NeSC). [2] Both of the above implementations are available for distribution. We will explore the architecture, programming model, and a sample implementation on these platforms. In this final chapter of the book, we will concentrate on the OGSI.NET toolkit framework implementation. | 