I can get easily see what projects and dlls a single project references from within a Visual Studio .NET project.
Is there any application or use of reflection that can build me a full dependency tree that I can use to plot a graphical chart of dependencies?
In addition to NDepend, you can also try this addin for Reflector for showing assembly dependency graph.
NDepend comes with a dependency graph coupled with a dependency matrix. You can try NDepend straight on your code thanks to a Free Trial Edition. See screenshoots extracted from this blog post: Interactive Code Dependencies Graph
You can create a dependency graph of projects and assemblies in Visual Studio 2010 Ultimate by using Architecture Explorer to browse your solution, select projects and the relationships that you want to visualize, and then create a dependency graph from your selection.
For more info, see the following topics:
How to: Generate Graph Documents from Code: http://msdn.microsoft.com/en-us/library/dd409453%28VS.100%29.aspx#SeeSpecificSource
How to: Find Code Using Architecture Explorer: http://msdn.microsoft.com/en-us/library/dd409431%28VS.100%29.aspx
RC download: http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=457bab91-5eb2-4b36-b0f4-d6f34683c62a.
Visual Studio 2010 Architectural Discovery & Modeling Tools forum: http://social.msdn.microsoft.com/Forums/en-US/vsarch/threads
Structure101 can do that. You can browse a model by assembly and/or namespace, and clicking on any dependency at any level give you all the code-level references that cause the dependency. The .NET version is in beta, but it's been available for other languages for years, so it's very mature. Here's an example screen shot.
