Roslyn Refactoring + Visual Studio extension to regenerate dependency injected constructors in one command.
This library is also used as a medium complexity project in a series of tutorials on Roslyn: http://ikoshelev.azurewebsites.net/search/id/5/Roslyn-beyond-'Hello-world'-01-Important-concepts-and-development-setup http://ikoshelev.azurewebsites.net/search/id/7/Roslyn-beyond-'Hello-world'-02-Visual-Studio-extension-for-refactoring http://ikoshelev.azurewebsites.net/search/id/8/Roslyn-beyond-'Hello-world'-03-Symbol-Graph-and-analyzer-diagnostics
Available from Visual Studio gallery https://marketplace.visualstudio.com/items?itemName=Koshelew.DiConstructorGeneratorExtension
Gallery also contains a small instruction on how to use it.