Adopt SharpDevelop's "Tools -> Convert Code to (other language)"
In SharpDevelop there is a useful tool which allows you to load a VB class and then convert it into C# (via Tools -> Convert Code to ...).
It currently supports source code conversions between VB.NET and C# (and vice versa).
Since SharpDevelop is Open Source, maybe it is not too difficult to add this feature to SharpDevelop?
Matt shared this idea