Const methods in C#

Question

In C++, you can define a constant method like so:

int func_that_does_not_modify_this(int arg) const {}

Placing const at the en

Answer 1

No. There's nothing similar in C#.

No const & either.

As Jon points out you can obviously implement a const method, but there's no way beyond documentation to let the caller know that a method is const.