Is it safe for structs to implement interfaces?

Question

I seem to remember reading something about how it is bad for structs to implement interfaces in CLR via C#, but I can\'t seem to find anything about it. Is it bad? Are the

Answer 1

There are several things going on in this question...

It is possible for a struct to implement an interface, but there are concerns that come about with casting, mutability, and performance. See this post for more details: https://docs.microsoft.com/en-us/archive/blogs/abhinaba/c-structs-and-interface

In general, structs should be used for objects that have value-type semantics. By implementing an interface on a struct you can run into boxing concerns as the struct is cast back and forth between the struct and the interface. As a result of the boxing, operations that change the internal state of the struct may not behave properly.