添加项目文件。

Sai.RvKits Setup/Dialogs/WelcomeDialog.xaml.cs

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+using System.Windows.Media.Imaging;
+
+using Caliburn.Micro;
+
+using WixSharp;
+using WixSharp.UI.Forms;
+using WixSharp.UI.WPF;
+
+namespace Sai.RvKits_Setup
+{
+    /// <summary>
+    /// The standard WelcomeDialog.
+    /// <para>Follows the design of the canonical Caliburn.Micro View (MVVM).</para>
+    /// <para>See https://caliburnmicro.com/documentation/cheat-sheet</para>
+    /// </summary>
+    /// <seealso cref="WixSharp.UI.WPF.WpfDialog" />
+    /// <seealso cref="WixSharp.IWpfDialog" />
+    /// <seealso cref="System.Windows.Markup.IComponentConnector" />
+    public partial class WelcomeDialog : WpfDialog, IWpfDialog
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="WelcomeDialog" /> class.
+        /// </summary>
+        public WelcomeDialog()
+        {
+            InitializeComponent();
+        }
+
+        /// <summary>
+        /// This method is invoked by WixSHarp runtime when the custom dialog content is internally fully initialized.
+        /// This is a convenient place to do further initialization activities (e.g. localization).
+        /// </summary>
+        public void Init()
+        {
+            ViewModelBinder.Bind(new WelcomeDialogModel { Host = ManagedFormHost }, this, null);
+        }
+    }
+
+    /// <summary>
+    /// ViewModel for standard WelcomeDialog.
+    /// <para>Follows the design of the canonical Caliburn.Micro ViewModel (MVVM).</para>
+    /// <para>See https://caliburnmicro.com/documentation/cheat-sheet</para>
+    /// </summary>
+    /// <seealso cref="Caliburn.Micro.Screen" />
+    internal class WelcomeDialogModel : Caliburn.Micro.Screen
+    {
+        public ManagedForm Host;
+        ISession session => Host?.Runtime.Session;
+        IManagedUIShell shell => Host?.Shell;
+
+        public BitmapImage Banner => session?.GetResourceBitmap("WixSharpUI_Bmp_Dialog").ToImageSource();
+
+        public bool CanGoPrev => false;
+
+        public void GoPrev()
+            => shell?.GoPrev();
+
+        public void GoNext()
+            => shell?.GoNext();
+
+        public void Cancel()
+            => shell?.Cancel();
+    }
+}