Hi, I'm doing some research on Database and Entities. I tested a great object database for .NET and JAVA open source called db4object . "db4o is the open source object database that enables Java and .NET developers to store and retrieve any application object with only one line of code, eliminating the need to predefine or maintain a separate, rigid data model". Native to Java and .NET 100% object-oriented database, no object-relational mapping Designed for embedded use Open source...