添加项目文件。

XXCpzs/Views/AboutPage.xaml.cs

@@ -0,0 +1,18 @@
+using System;
+using System.ComponentModel;
+using Xamarin.Forms;
+using Xamarin.Forms.Xaml;
+
+namespace XXCpzs.Views
+{
+    // Learn more about making custom code visible in the Xamarin.Forms previewer
+    // by visiting https://aka.ms/xamarinforms-previewer
+    [DesignTimeVisible(false)]
+    public partial class AboutPage : ContentPage
+    {
+        public AboutPage()
+        {
+            InitializeComponent();
+        }
+    }
+}