Rational Modeling Extension is designed to complement the use of Microsoft Visual Studio® 2005, and the use of the Class Designer feature within Visual Studio (Class Designer is also an implementation of code modeling as described above). Rational Modeling Extension is not meant to replace the Class Designer feature. Accordingly, Rational Modeling Extension does not provide full visual code editing capability like the code modeling support for Java or C++ found in Rational Systems Developer, Rational Application Developer, or Rational Software Architect. In the .NET world, that is the job of Class Designer, and Rational Modeling Extension only provides read-only visualization of C# (based on source code files) and CTS types (based on binaries contained in assemblies). This is sufficient to provide significant value, by complementing Class Designer with visualization features that Class Designer does not support. While Rational Modeling Extension does allow you to visually depict C# ( Classes, Interfaces, Structs, Delegates, etc), using class diagrams just as Class Designer does, it also provides support for you to review the structure of the application by viewing relationships between various .NET elements using Browse and Topic diagrams. In addition, it lets you depict typical or what if interactions between .NET classes in Sequence diagrams. Class Designer does not support Topic, Browse, or Sequence diagrams.