gistfile1.cs

    public class Parent<T>
    {
        public virtual T Name { get; set; }
    }

    public class Child : Parent<string>
    {
        public override string Name { get; set; }
    }
    
    class Program
    {
        static void Main(string[] args)
        {
            var count = typeof (Child).GetProperties().Length;      
            Console.WriteLine(count);      
        }
    }