Dynamically Loading Silverlight Video Players using MEF

// Copyright (c) 2010
// by OpenLight Group
// http://openlightgroup.net/
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated 
// documentation files (the "Software"), to deal in the Software without restriction, including without limitation 
// the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and 
// to permit persons to whom the Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or substantial portions 
// of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED 
// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
//
// CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
// DEALINGS IN THE SOFTWARE.

using System.Collections.Generic;
using System.Linq;
using System.Web.Services;
using System.IO;
using System;
using System.Collections.ObjectModel;
using System.Web;

namespace SkinableVideoPlayer
{
    [WebService(Namespace = "http://OpenLightGroup.net/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    public class WebService : System.Web.Services.WebService
    {
        #region GetVideos
        [WebMethod(Description = "GetVideos")]
        public ObservableCollection<string> GetVideos()
        {
            string FolderPath = this.Context.ApplicationInstance.Server.MapPath(@"~\Video\");

            ObservableCollection<string> colFiles = new ObservableCollection<string>();

            // Add all directories at this directory.
            DirectoryInfo objDirectoryInfo = new DirectoryInfo(FolderPath);

            foreach (var fi in objDirectoryInfo.EnumerateFiles().Where(y => y.Extension == ".wmv").OrderBy(x => x.Name))
            {
                colFiles.Add(fi.Name);
            }

            return colFiles;
        }
        #endregion

        #region GetXaps
        [WebMethod(Description = "GetXaps")]
        public ObservableCollection<string> GetXaps()
        {
            string FolderPath = this.Context.ApplicationInstance.Server.MapPath(@"~\ClientBin\");

            ObservableCollection<string> colFiles = new ObservableCollection<string>();

            // Add all directories at this directory.
            DirectoryInfo objDirectoryInfo = new DirectoryInfo(FolderPath);

            foreach (var fi in objDirectoryInfo.EnumerateFiles().Where(y => y.Extension == ".xap").OrderBy(x => x.Name))
            {
                if (fi.Name != "SkinableVideoPlayer.xap")
                {
                    colFiles.Add(fi.Name);
                }
            }

            return colFiles;
        }
        #endregion
    }
}