MVVM for Multi Platforms

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using GeographicRepresentation.Interfaces;
using GeographicRepresentation.Lib.Model;

namespace GeographicRepresentation.Lib.ViewModel
{
    public class ContinentsListViewModel : IContinentsListViewModel
    {
        #region Members

        List<IReadOnlyContinentViewModel> m_Continents;

        #endregion

        #region Methods

        #region Ctor

        public ContinentsListViewModel()
        {
            m_Continents = new List<IReadOnlyContinentViewModel>();
            LoadContinentsFromRepository();
        }

        #endregion
        
        #region IContinentsListViewModel Members

        public IList<IReadOnlyContinentViewModel> Continents
        {
            get 
            {
                return m_Continents;
            }
        }

        public void LoadContinentsFromRepository()
        {
            m_Continents.Clear();
            List<Continent> continents = DataManager.Instance.GetAllContinents();
            for (int iter = 0; iter < continents.Count; iter++)
            {                
                m_Continents.Add(new ReadOnlyContinentViewModel(continents[iter]));
            }
        }

        /// <summary>
        /// Request to remove an object
        /// </summary>
        /// <param name="readOnlyObject">The selected object to remove</param>
        public void RemoveGeographicObject(IReadOnlyViewModel readOnlyObject)
        {
            if (readOnlyObject != null)
            {
                if (readOnlyObject.GetType().GetInterfaces().Contains(typeof(IReadOnlyContinentViewModel)))
                {
                    DataManager.Instance.RemoveContinent(((IReadOnlyContinentViewModel)readOnlyObject).Id);
                    // Remove the continent from the continents list
                    m_Continents.Remove((IReadOnlyContinentViewModel)readOnlyObject);
                }
                else if (readOnlyObject.GetType().GetInterfaces().Contains(typeof(IReadonlyCountryViewModel)))
                {
                    DataManager.Instance.RemoveCountry(((IReadonlyCountryViewModel)readOnlyObject).Id);
                }
                else if (readOnlyObject.GetType().GetInterfaces().Contains(typeof(IReadOnlyCityViewModel)))
                {
                    DataManager.Instance.RemoveCity(((IReadOnlyCityViewModel)readOnlyObject).Id);
                }
            }                
        }

        #endregion

        #endregion
    }
}