Does anyone know if there is a good / simple OOP template / example project for visual studio 2017 with comments
and that is recenly updated ?
I'm not aware of a project with Object Oriented Programming code samples but the C# programming guide cover OOP in C#.
https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/concepts/object-oriented-programming
You can find here
https://msdn.microsoft.com/en-us/library/dd460654.aspx?f=255&MSPPError=-2147217396