Preface In today's enterprise environment, the existence of heterogeneous platforms is a reality. The need for interoperability between the different technology platforms is not just a question of desirability but rather one of necessity. Interoperability between the two of the most widely deployed platforms, the JavaTM 2 platform Enterprise Edition (J2EETM) and .NET, is paramount for most cases. In this IBM® Redbook, we will explore the different interoperability models for the IBM WebSphere® and the Microsoft® .NET platforms. This book is a good source of information for solution designers, application integrators, and developers who wish to develop solutions that incorporate interoperability of applications running on WebSphere and .NET platforms. This book builds on two prior IBM RedbooksTM, WebSphere and .Net Interoperability Using Web Services, SG24-6395, which is available at: http://www.redbooks.ibm.com/abstracts/sg246395.html?Open And WebSphere and .NET Coexistence, SG24-7027, which is available at: http://www.redbooks.ibm.com/abstracts/sg247027.html?Open