Web 7.0: DID Method Open Multiple Inheritance Model 0.2

using System;
using System.Collections.Generic;
using System.Runtime.ConstrainedExecution;
using System.Runtime.InteropServices;
using DIDID = System.String;
namespace DIDMethodOpenInheritanceModel1
{
public class DIDDocument
{
    DIDID id { get; set; }
    //
    // Other properties of a DID Document would go here, such as public keys, 
    //                         authentication methods, service endpoints, etc.
    //
}
public interface DIDDocumentCollection
{
    Dictionary<DIDID, DIDDocument> DidDocuments { get; set; }
    public bool RegIdWIthPublicKey(DIDID didobjectid, byte[] publicKey);
    public DIDDocument GetDIDDocument(DIDID didobjectid);
    public bool AddKey(DIDID didobjectid, byte[] newPublicKey, byte[] sender);
    public bool RemoveKey(DIDID didobjectid, byte[] oldPublicKey, byte[] sender);
}
public class DIDMethod
{
    DIDDocumentCollection? DidDocumentRegistry = null;
    //
    // Other properties of a DID Method would go here - needed to support 
    //                       the core functionality of a DID Method
    // DID registry specific properties of a particular DID Method go
    //                       in one of the polymorphic classes (see below)
    public DIDMethod(DIDDocumentCollection diddocumentregistry)
    {
        DidDocumentRegistry = diddocumentregistry;
        Console.WriteLine("DIDMethod (core) constructor called. Registry opened.");
    }
}
// DIDMethod Base Classes for key-based, DNS-based, fully decentralized DIDDocunentCollections
public class KeyBasedDIDMethod : DIDMethod
{
    public KeyBasedDIDMethod(DIDDocumentCollection diddocumentregistry) : base(diddocumentregistry)
    { 
        Console.WriteLine("KeyBasedDIDMethod constructor called. Registry opened.");
    }
}
public class DNSBasedDIDMethod : DIDMethod
{
    public DNSBasedDIDMethod(DIDDocumentCollection diddocumentregistry) : base(diddocumentregistry)
    {
        Console.WriteLine("DNSBasedDIDMethod constructor called. Registry opened.");
    }
}
public class FullyDecentralizedDIDMethod : DIDMethod
{
    public FullyDecentralizedDIDMethod(DIDDocumentCollection diddocumentregistry) : base(diddocumentregistry)
    {
        Console.WriteLine("FullyDecentralizedDIDMethod constructor called. Registry opened.");
    }
}
public class MegaDIDMethod : DIDMethod, IDIDKeyRotation, IDIDRevocationList, IDIDEventHistoryLog, IDIDCelStuff
{
    public MegaDIDMethod(DIDDocumentCollection diddocumentregistry) : base(diddocumentregistry)
    {
        Console.WriteLine("MegaDIDMethod constructor called. Registry opened.");
    }
    public bool DummyDIDCellFunction(string dobjectid)
    {
        throw new NotImplementedException();
    }
    public bool DummyRevokeDIDDocumentFunction(string didobjectid)
    {
        throw new NotImplementedException();
    }
    public bool DummyRotateKeysFunction(string didobjectid, string eventDescription)
    {
        throw new NotImplementedException();
    }
    public bool DummyUpdateEventHistoryLogFunction(string didobjectid, string eventDescription)
    {
        throw new NotImplementedException();
    }
}
internal class Program
{
    static void Main(string[] args)
    {
        DIDID did = "did:example:123456789abcdefghi";
        Console.WriteLine($"DID: {did}");   
        Console.WriteLine("\nCreating DID Document Registry...");
        DIDMethod klm = new KeyBasedDIDMethod(new DummyDIDDocumentCollection()) as DIDMethod;
        Console.WriteLine("\nCreating DID Document Registry...");
        DIDMethod def = new DNSBasedDIDMethod(new DummyDIDDocumentCollection()) as DIDMethod;
        Console.WriteLine("\nCreating DID Document Registry...");
        DIDMethod fgh = new FullyDecentralizedDIDMethod(new DummyDIDDocumentCollection()) as DIDMethod; 
        Console.WriteLine("\nCreating DID Document Registry...");
        DIDMethod mega = new MegaDIDMethod(new DummyDIDDocumentCollection()) as DIDMethod; 
        Console.WriteLine("\nHello World!");
        Console.ReadLine();
    }
}
}