Сделал переход на новую страничку

MainPage.xaml

@@ -30,6 +30,12 @@
                 SemanticProperties.Hint="Counts the number of times you click"
                 Clicked="OnCounterClicked"
                 HorizontalOptions="Fill" />
+            <Button
+                x:Name="NewPageOpenbtn"
+                Text="New page" 
+                SemanticProperties.Hint="Counts the number of times you click"
+                Clicked="NewPageOpenbtn_Clicked"
+                HorizontalOptions="Fill" />
         </VerticalStackLayout>
     </ScrollView>
 

MainPage.xaml.cs

@@ -20,6 +20,11 @@
 
             SemanticScreenReader.Announce(CounterBtn.Text);
         }
+
+        private async void NewPageOpenbtn_Clicked(System.Object sender, System.EventArgs e)
+        {
+            await Navigation.PushAsync(new NewPage1());
+        }
     }
 
 }