using System;

using System.Text.Json;

​

public class MDEntity

{

}

​

public class RelationshipEntity : MDEntity

{

    public RelationshipProperties Properties { get; set; }

}

​

public class RelationshipProperties

{

    internal RelationshipProperties(string name)

    {

        Name = name;

    }

​

    public string Name { get; set; }

}

​

public class SomeClass

{

    public static void Main()

    {

        RelationshipEntity relationship = new RelationshipEntity();

        MDEntity entity = relationship;

        relationship.Properties = new RelationshipProperties("b");        

        Console.WriteLine(JsonSerializer.Serialize(relationship.Properties));

        Console.WriteLine(JsonSerializer.Serialize(entity));

    }

}

​

​