Windows Phone获得IsolatedStorage中指定目录下的所有文件

        List<string> GetFileNames(string _strFolder)
        {
            List<string> returnlst = new List<string>();
            using (IsolatedStorageFile storage = IsolatedStorageFile.GetUserStoreForApplication())
            {
                returnlst.AddRange(storage.GetFileNames(_strFolder));
            }
            return returnlst;
        }