How to refactor tightly coupled classes?

Question

I\'m trying to refactor a big tightly coupled application and trying to make it more maintainable and flexible.

I\'ve got many unit tests, so I\'m hoping to refactor ste

Answer 1

Thanks for all answers, After struggling with so many different ways I found that the best thing to do was creating interfaces for everything. This allowed me to change the design freely and I only break the build for a day (a day because the project was big and I need to fix so many references and unit tests + some refactoring).

After day extracting and fixing all interfaces I can create separate solutions and play with the design freely.

Basically first move I think should be moving everything to interfaces and then try to get rid of internal dependencies.