One possibility could be something like C# global usings added last year. Instead of having your usings in every file, you can define them with the `global` key

One possibility could be something like C# global usings added last year. Instead of having your usings in every file, you can define them with the `global` keyword and take effect in every file in your project. It's great for common things like the `IEnumerable` extension methods which reside in `System.Linq`.