如何在WPF中创建基页？

<Page x:Class="MyProject.MainPage"
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
      xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
      mc:Ignorable="d"
      d:DesignHeight="450" d:DesignWidth="800"
      Title="Main Page">

    <Grid>
        <!-- 在这里添加控件和布局 -->
    </Grid>
</Page>

using System.Windows.Controls;

namespace MyProject
{
    public partial class MainPage : Page
    {
        public MainPage()
        {
            InitializeComponent();
        }

        // 在这里添加基页的逻辑
    }
}

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:MyProject"
        mc:Ignorable="d"
        Title="Main Window" Height="450" Width="800">

   <Frame>
       <local:MainPage />
    </Frame>
</Window>