问题:

In Visual Studio 2010 I can generate class diagram from my project with 2 clicks. But now in Visual Studio 2013 I don't see the option "View Class Diagram" in project menu. Where did this item disappear? How can I generate class diagram from project now?

回答1:

Right click on the project in solution explorer or class view window --> "View" --> "View Class Diagram"

回答2:

For creating real UML class diagrams:

In Visual Studio 2013 Ultimate you can do this without any external tools.

In the menu, click on Architecture, New Diagram Select UML Class Diagram
This will ask you to create a new Modeling Project if you don't have one already.

You will have a empty UMLClassDiagram.classdiagram.

Again, go to Architecture, Windows, Architecture Explorer.
A window will pop up with your namespaces, Choose Class View.
Then a list of sub-namespaces will appear, if any. Choose one, select the classes and drag them to the empty UMLClassDiagram1.classdiagram window.

Reference: Create UML Class Diagrams from Code