Here are all the HackerRank OOP related problems, converted from Java code, to the C# one. It was for the C# learning process I was overgoing.
For now, its a mess. I will do my best to find the time needed to organize it. Know that all the folders here are visual studio projects I've uselessly uploaded back then. Some of the variable naming is taken from the HackerRank Java skelet code, in a pursue of 'authenticity'. The end resoult is that the actual code is scattered between a lot of unused folders, with some inconsistent coding style.