To create an enterprise data grid application in which both Java™ and .NET clients can update the same data grid, you must make your classes compatible. In the getting started sample applications, the .NET sample application has aliases to match the Java defaults.
[ClassAlias( "com.ibm.websphere.xs.sample.gettingstarted.model.TestKey" )]
[ClassAlias( "com.ibm.websphere.xs.sample.gettingstarted.model.TestValue" )]
You added class attributes to the .NET getting started application. As a result you can interoperate with the Java getting started application, creating an enterprise data grid.