This article provides an overview of UML modeling in Visual Studio 2010. Assuming that reader is already familiar with UML, it focuses on custom UML profiles - an extensibility mechanism that can be used to tailor UML models to a particular problem domain. Readers will see an example of such a profile, which extends UML Class Diagrams for database modeling. Finally, the article shows how code can be generated from UML models using T4 text templates.