C# extension (v0.9.0) is available in Extension Registry. It allows you to generate C# skeleton source codes from UML model, and reverse from existing C# source codes to UML model. This extension is open source and hosted on Github (https://github.com/staruml/CSharp) under MIT License.
StarUML v2.0.0-beta11 is now available for download. This release includes the following features and fixed issues.
Full Screen Mode for OS X Yosemite
Button for Full screen mode was changed in the new version of OS X (Yosemite). Now it is adopted in this release. In Mac OS X Yosemite, the third green button act as full screen mode but with Alt/Option key it act as maximize mode.
Asynchronous Model Validation
According to the UML Specification, there are many constraints that must be satisfied. It is very helpful to avoid many mistakes and making invalid models. Now total 57 UML model validation rules have defined for StarUML and the rules are checked asynchronously when you save or open your model files.
The detailed resolved issues can be found at Release Note.