Schematics 10 introduces major changes in the structure of the libraries that define the Schematics classes and interfaces that you use as a developer. The new architecture simplifies concepts and brings the user experience closer to that of a standard feature class or feature dataset.
The new type libraries require some changes to your existing projects. The changes made between Schematics 9.x and the current release are outlined in the Migrating schematic custom code to ArcGIS 10 topic, available in the ArcObjects SDK 10 for the Microsoft .NET Framework.