universities.cs

public class HavardUniversity : ISchool
{
    public string Learn(string student)
    {
        return string.Format($"My name is {student}, and I attend Havard");
    }
}

public class OxfordUniversity : ISchool
{
    public string Learn(string student)
    {
        return string.Format($"My name is {student}, and I attend Oxford");
    }
}