The Kestrel web server[0] is an example of a codebase that makes extensive use of C#'s unsafe functionality. UnmanagedBufferAllocator[1], for example, looks pretty similar to how you'd write it in C++.

[0] https://github.com/dotnet/aspnetcore/tree/1a56bdb671700ae698...

[1] https://github.com/dotnet/aspnetcore/blob/1a56bdb671700ae698...