What is c# analog of C++ const reference return value

Question

I do write c++ accessor to class member as

SomeClass const& x() const { return m_x; }

It seems that the only protection of this sort in c# is to define property with private (or undefined) set. But this protects only against assignments not against manipulation of the some-class state.

Side note: c++ allows m_x to be deleted through const pointer - IMHO this is simply amazing oversight of standard bodies.

Answer 1

Now, with C# 7.2, you can use ref readonly for the same purpose. You can check more about that here. Check the third point.