添加项目文件。

Views/MainView.xaml

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+<Window
+    x:Class="PMSWPF.Views.MainView"
+    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:i="http://schemas.microsoft.com/xaml/behaviors"
+    xmlns:local="clr-namespace:PMSWPF.Views"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    xmlns:vm="clr-namespace:PMSWPF.ViewModels"
+    Title="MainView"
+    Width="800"
+    Height="450"
+    d:DataContext="{d:DesignInstance vm:MainViewModel}"
+    mc:Ignorable="d">
+    <StackPanel>
+        <TextBlock
+            HorizontalAlignment="Center"
+            FontSize="36"
+            Text="{Binding Message}" />
+
+        <Border
+            Width="100"
+            Height="100"
+            Background="Orange">
+            <i:Interaction.Behaviors>
+                <i:MouseDragElementBehavior />
+            </i:Interaction.Behaviors>
+        </Border>
+    </StackPanel>
+</Window>

Views/MainView.xaml.cs

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+using System.Windows;
+using PMSWPF.ViewModels;
+
+namespace PMSWPF.Views
+{
+    /// <summary>
+    /// MainView.xaml 的交互逻辑
+    /// </summary>
+    public partial class MainView : Window
+    {
+        public MainView()
+        {
+            InitializeComponent();
+            this.DataContext = new MainViewModel();
+        }
+    }
+}