using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        DocumentProps p = new DocumentProps();

        p.DocumentId = new Guid("8a888e8c-5d85-2eaa-423b-713cfb7b0ddf"); 

        Console.WriteLine(p.DocumentId);

        ObjectWithId q = new ObjectWithId();

        q.ObjectId = new Guid("43a1b3b4-8219-0c9e-4335-977c6bbfa452");

        Console.WriteLine(q.ObjectId);

    }

}

​

public class SafePropertyCollection

{

    private Dictionary<string, object> kvps { get; set; }

    private void Set(string key, object v)

    {

        if(kvps == null) kvps = new Dictionary<string, object>();

        kvps[key] = v;

    }

    private object GetObject(string key)

    {

        if(kvps == null) return null;

        return kvps[key];

    }

    protected void Set(string key, string v)

    {

        Set(key,(object)v);

    }

    protected void Set(string key, Guid v)

    {

        Set(key,(object)v);

    }

    protected void Set(string key, int v)

    {

        Set(key,(object)v);

    }

    protected string GetString(string key)

    {

        return (string)GetObject(key);

    }

    protected int GetInt32(string key)

    {

        return (int)GetObject(key);

    }

    protected Guid GetGuid(string key)

    {

        var g = GetObject(key).ToString();

        return Guid.Parse(g);

    }

    public string ToJson()

    {

        throw new NotImplementedException();

    }

    public void FromJson() {

        throw new NotImplementedException();

    }

    protected void SetObjectPrimaryKey(Guid v)

    {

        Set("ObjectPrimaryKey",(object)v);

    }

    protected Guid GetObjectPrimaryKey()

    {

        var g = GetObject("ObjectPrimaryKey").ToString();

        return Guid.Parse(g);

    }

}

​

class ObjectWithId : SafePropertyCollection {

    public Guid ObjectId 

    {

        get { return base.GetObjectPrimaryKey(); }

        set { base.SetObjectPrimaryKey(value); }

    }

}

​

class DocumentProps : ObjectWithId

{

    public Guid DocumentId 

    {

        get { return base.ObjectId; }

        set { base.ObjectId = value; }

    }

    public string Title

    {

        get { return base.GetString("Title"); }

        set { base.Set("Title", value); }

    }

}