One of my favourite features that we added to MonoDevelop 2.4 is the “import Type” command. It is accessed using the keybinding Ctrl-Alt-Space, and shows a list of all types in all namespaces in all referenced assemblies.
You can use our completion list
filtering to find the type
you’re looking for, then, when you commit the selection from the list,
MonoDevelop automatically adds the “using” statement to the file. For example,
using StringBuilder is as easy as <ctrl-alt-space>StrB<space> even if you
don’t yet have using System.Text; at the top of the file.