How to mark a method or class as deprecated/obsolete in C#?

Hello everyone. I'm new to C# and writing a class library that other developers in my company will use. Over time, some methods become outdated, and I want a warning or compilation error to appear when they are used in code, so developers understand that the method should not be used and they should switch to the new API. Please advise how to do this correctly in C#? Is a special attribute needed for this? Can I specify the message text that will be shown in the IDE? And is it possible to make using the old method cause not just a warning but a compilation error? Example: I have an old method `GetData(int id)` that returns data, and a new method `FetchData(int id, bool useCache)`. I want everyone who writes `GetData(5)` to...