using System;

public class Program

{

    public static void Main()

    {

        var docNode = new DocumentNode();

        Console.WriteLine("Use DocumentNode");

        docNode.Transactions.ExecuteInvisibleTransaction();

        Console.WriteLine();

        Console.WriteLine();

        var docNodeExt = new DocumentNodeExt();

        Console.WriteLine("Use DocumentNodeExt");

        docNodeExt.Transactions.ExecuteInvisibleTransaction();

        Console.WriteLine();

        Console.WriteLine();

        Console.WriteLine("Cast DocumentNodeExt to DocumentNode");

        ((DocumentNode)docNodeExt).Transactions.ExecuteInvisibleTransaction();

    }

}

​

public class DocumentNode : ITransactions

{

    void ITransactions.ExecuteInvisibleTransaction() => Console.WriteLine("ExecuteInvisibleTransaction in DocumentNode");

    public ITransactions Transactions => this;

}

​

public class DocumentNodeExt : DocumentNode

{

    public new ITransactions Transactions { get; }

    public DocumentNodeExt()

    {

        Transactions = new TransactionsWrapper(this);

    }

}

​

public class TransactionsWrapper : ITransactions

{

    private readonly ITransactions _transactions;

    public TransactionsWrapper(ITransactions transactions)

    {

        _transactions = transactions;

    }

    public void ExecuteInvisibleTransaction()

    {

        Console.WriteLine("ExecuteInvisibleTransaction in TransactionsWrapper");

        _transactions.ExecuteInvisibleTransaction();

    }

}

​

public interface ITransactions

{

    void ExecuteInvisibleTransaction();

}

​

​