Visual Web Developer Express makes it easy to essentially “pause” your application while running simply by adding a breakpoint to the line of code that you went to examine closer. You can then step through each line of code and examine the state of all variables as the code executes – this is incredibly useful for tracking down pesky bugs!

The Exception Assistant provides detailed information about any exceptions you encounter when debugging your application, and more importantly, it also provides recommendations for how to fix any errors.

Debugger data tips provide support for quickly inspecting variables while debugging your Web application. To use debugger Data Tips, simply place your mouse cursor over a type and you can then drill directly into the type’s content.

When examining variables, it is easy to make sense of a simple numeric type, but more complex types, like an XML file may be harder to visualize. Debugger Visualizers provide a visual representation of your objects so that you can “see” your data while debugging. For example, you can see a graphical representation of an XML string, like an RSS feed using the XML Visualizer.

You can then also use the DataSet Visualizer to easily view and navigate the contents of a DataSet.