Pagnig Class

 public partial class PagerUC : UserControl, INotifyPropertyChanged
    {
        int Page=1, PageSize = 10, TotPage;
        private IEnumerable<Object> _ItemsSource;
        private IEnumerable<Object> _CurrentView;
        public PagerUC()
        {
            InitializeComponent();

        }

        private void SetTotalPages()
        {
            TotPage = _ItemsSource.Count() / PageSize;
            if (_ItemsSource.Count() % PageSize > 0)
            {
                TotPage++;
            }
            LoadComboPageBox(TotPage);
            SetComboPageBox(Page);
            loadList(Page, PageSize);
        }
        private void loadList(int page, int pagesize)
        {
            CurrentView = _ItemsSource.Skip((page - 1) * pagesize).Take(pagesize);
            lblTotPage.Content = String.Format("/ {0}", TotPage);
        }

        private void SetComboPageBox(int Page)
        {
            cmbxPageNo.SelectedIndex = Page - 1;
        }

        private void LoadComboPageBox(int TotPage)
        {
            List<string> _pagelist = new List<string>();
            for (int i = 1; i <= TotPage; i++)
            {
                _pagelist.Add(i.ToString());
            }
            cmbxPageNo.ItemsSource = _pagelist;
        }

        private void btnNav_Click(object sender, RoutedEventArgs e)
        {
            Button btn = (Button)sender;
            switch (btn.Tag.ToString())
            {
                case Paging.First: Page = 1;
                    break;
                case Paging.Next: if (Page < TotPage) Page++;
                    break;
                case Paging.Previous: if (Page > 1) Page--;
                    break;
                case Paging.Last: Page = TotPage;
                    break;
            }
            SetComboPageBox(Page);
            loadList(Page, PageSize);
        }
        public IEnumerable<Object> ItemsSource
        {
            get { return _ItemsSource; }
            set
            {
                _ItemsSource = value;
                SetTotalPages();
            }
        }
        public IEnumerable<Object> CurrentView
        {
            get { return _CurrentView; }
            set
            {
                _CurrentView = value;
                if (PropertyChanged != null)
                    PropertyChanged(this, new PropertyChangedEventArgs("CurrentView"));
            }
        }
        #region INotifyPropertyChanged Members
        public event PropertyChangedEventHandler PropertyChanged;
        #endregion

        private void cmbxPageNo_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            int _tpage = Page;
            if (cmbxPageNo.SelectedItem!=null)
            {
                Page = Convert.ToInt16(cmbxPageNo.SelectedItem.ToString());
                if (_tpage != Page)
                {
                    loadList(Page, PageSize);
                }
            }
        }
    }