создание стр

WpfApp1/Page1.xaml

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+<Page x:Class="WpfApp1.Page1"
+      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" 
+      xmlns:local="clr-namespace:WpfApp1"
+      mc:Ignorable="d" 
+      d:DesignHeight="450" d:DesignWidth="800"
+      Title="Page1">
+
+    <Grid>
+        
+    </Grid>
+</Page>

WpfApp1/Page1.xaml.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+
+namespace WpfApp1
+{
+    /// <summary>
+    /// Логика взаимодействия для Page1.xaml
+    /// </summary>
+    public partial class Page1 : Page
+    {
+        public Page1()
+        {
+            InitializeComponent();
+        }
+    }
+}