I’m currently facing a large piece of legacy code which I have to understand and rewrite to make it more maintainable.
Is there a tool that would show let me explore easily the graph of the function calls in the file ?
Any text output like
Method1
Method2
Method3
Method2
Method3
Or graphical like

could help a lot.
Resharper allows your to inspect incoming or outgoing calls to a method.
I don’t know of a way to do this in visual studio without a plugin.
Also, NDepend might be an option for you as well. I’ve never used it, but it looks like it can do what you’re requesting.