How to: Export Class Diagrams As Images (Class Designer)
You can save your class diagram in various image formats.
Make sure that you have an open class diagram (.cd) file.
This makes the Class Diagram menu appear on your Visual Studio menu bar.
From the Class Diagram menu or the class diagram shortcut menu, choose Export Diagram as Image.
Select one or more diagrams.
Under Image Format, choose the format you want.
Choose Export to finish exporting.
If you link to exported images from other documents, you can automatically update the linked images in those documents by choosing Export Diagram as Image again.