using System;

using System.Net;

using System.Text;

using System.Text.RegularExpressions;

using Microsoft.AspNetCore.HttpOverrides;

​

public class Program

{

    public static void Main()

    {

        var address4 = new IPAddress(new byte[] { 172, 16, 1, 2 });

        var address6 = new IPAddress(new byte[] { 172, 16, 1, 2 }).MapToIPv6();

        var range4 = new IPNetwork(new IPAddress(new byte[] { 172, 16, 1, 1 }), 32);

        var range6 = new IPNetwork(new IPAddress(new byte[] { 172, 16, 1, 1 }).MapToIPv6(), 32);

        Console.WriteLine(

            range4.Contains(address4)

        );

        Console.WriteLine(

            range4.Contains(address6)

        );

        Console.WriteLine(

            range6.Contains(address4)

        );

        Console.WriteLine(

            range6.Contains(address6)

        );

    }

}

//--------------------------------------------------

class BaseParent {

    public string Name { get; set; }

    public BaseChild Child { get; set; }

}

class BaseChild {

    public int Age { get; set; }

}

class DerivedParent : BaseParent {

    // Hiding Base.Child

    public new DerivedChild Child { get; set; }

}

class DerivedChild : BaseChild { }

​

​

class BaseParentVm {

    public string Name { get; set; }

    public BaseChildVm Child { get; set; }

}

class DerivedParentVm : BaseParentVm {

    // Hiding Base.Child

    public new DerivedChildVm Child { get; set; }

}

​

class BaseChildVm {

    public int Age { get; set; }

}

class DerivedChildVm : BaseChildVm { }

​