vekzdran, 
Hear me out #dotnet #csharp folks.
If I could ask for one wish from the C# team, it would be naming generic parameters of types eg.
Dictionary<int userId, string username>
List<string username>
How would that make the world much easier...
I don't want to use own types*, yes I know I can do that.
Also, I do not like DDD and I enjoy primitive obsession.