void AddToolBarItems()
        {
            ToolbarItems.Add (new ToolbarItem ("DisplayView", ImageConstants.tiledIcon, () => {

                ViewModel.IsRunning = true;

                if (CurrentLayout == LayoutType.ListLayout) {
                    CurrentLayout = LayoutType.TiledLayout;
                    ToolbarItems.FirstOrDefault (i => i.Text == "DisplayView").Icon = ImageConstants.listIcon;
                    SwitchLayouts (CurrentLayout);
                } else {
                    CurrentLayout = LayoutType.ListLayout;
                    ToolbarItems.FirstOrDefault (i => i.Text == "DisplayView").Icon = ImageConstants.tiledIcon;
                    SwitchLayouts (CurrentLayout);
                }

                ViewModel.IsRunning = false;

            }));

            ToolbarItems.Add (
                new ToolbarItem ("LanguageFilter", ImageConstants.languageIcon, async () => {
                    var content = new NavigationPage (new DocumentsFilters (FilterTypes.Languages));
                    content.BarBackgroundColor = Color.Transparent;
                    content.BarTextColor = Color.White;
                    await Navigation.PushModalAsync (content, true);
                }));

            ToolbarItems.Add (new ToolbarItem ("CategoryFilter", ImageConstants.filterIcon, async () => {
                var content = new NavigationPage (new DocumentsFilters (FilterTypes.Categories));
                content.BarBackgroundColor = Color.Transparent;
                content.BarTextColor = Color.White;
                await Navigation.PushModalAsync (content, true);

            })
            );

            ToolbarItems.Add (new ToolbarItem ("SearchFilter", ImageConstants.searchIcon, async () => {
                var content = new SearchView (LibraryType.MyDocuments);
                await Navigation.PushAsync (content, true);
            })
            );
        }
		void AddToolBarItems ()
		{
			ToolbarItems.Add (new ToolbarItem ("DisplayView", ImageConstants.tiledIcon, () => {
				
				breadcrumbcategory.Text = GlobalVariables.SelectedCategory;
				ViewModel.IsRunning = true;

				if (CurrentLayout == LayoutType.ListLayout) {
					CurrentLayout = LayoutType.TiledLayout;
					ToolbarItems.FirstOrDefault (i => i.Text == "DisplayView").Icon = ImageConstants.listIcon;
					SwitchLayouts (CurrentLayout);
				} else {
					CurrentLayout = LayoutType.ListLayout;
					ToolbarItems.FirstOrDefault (i => i.Text == "DisplayView").Icon = ImageConstants.tiledIcon;
					SwitchLayouts (CurrentLayout);
				}

				ViewModel.IsRunning = false;
					
			}));

			ToolbarItems.Add (
				new ToolbarItem ("LanguageFilter", ImageConstants.languageIcon, async () => {
					var content = new NavigationPage (new ToolBarFilters (FilterTypes.Languages));
					content.BarBackgroundColor = Color.Transparent;
					content.BarTextColor = Color.White;
					await Navigation.PushModalAsync (content, true);
				}));

			ToolbarItems.Add (new ToolbarItem ("Refresh", "corningimages/refresh.png", () => {
				LoadDataAsync ();
			}));


			ToolbarItems.Add (new ToolbarItem ("CategoryFilter", ImageConstants.filterIcon, async () => {
				var content = new NavigationPage (new ToolBarFilters (FilterTypes.Categories));
				content.BarBackgroundColor = Color.Transparent;
				content.BarTextColor = Color.White;
				await Navigation.PushModalAsync (content, true);
			})
			);

			ToolbarItems.Add (new ToolbarItem ("SearchFilter", ImageConstants.searchIcon, async () => {
				var content = new SearchView (LibraryType.All);
				await Navigation.PushAsync (content, true);
			})
			);

		}