Is map thread safety while writing from a thread?

Question

C++ / C#

c++20 standard. The essence of the question is stated in the title.
If the answer is no, then what would be the best way to fix this, a normal mutex?

Answer 1

As far as I know, none of the containers in the standard library are thread safe. Therefore, you should create a wrapper class over the container and synchronize reading and writing with std::shared_mutex.