The VsVim plugin for Visual Studio gives you the best of both worlds! https://github.com/jaredpar/VsVim/

I second that. I'm so used to VI that I literally felt like a fish out of water when editing code with 'vanilla' Visual Studio. VsVim has saved my butt; I'd be lost without VsVim.

Now, with VsVim, I get the best of both worlds: IDE functionalities like refactoring, and excellent code completion, and the familiar VI key-bindings to edit the code.