Lutz Roeder’s .NET Reflector has to be one of the most useful tools in my bag of tricks - the ability to spelunk into the depths of an assembly to answer a tricky question has value beyond words.

Better yet, Reflector has a plug-in architecture, allowing others to extend the tool in new directions.

SequenceVIZ is one of those plug-ins, generating UML style sequence diagrams to illustrate the behaviour of a method.

Check out this example from my own code:

Sample Sequence Diagram

Very neat.

A couple of caveats do apply, however. Firstly, the plugin is dependent on a couple of third party extras that you’ll need to install as well - a GPL library to generate SVG files, and an IE plugin to view them.

Even so, well worth the effort.

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