Main app aot compatibility.

Wino.Mail.WinUI/Selectors/MailItemDisplayModePreviewTemplateSelector.cs

@@ -1,4 +1,5 @@
-using Microsoft.UI.Xaml;
+using System;
+using Microsoft.UI.Xaml;
 using Microsoft.UI.Xaml.Controls;
 using Wino.Core.Domain.Enums;
 
@@ -9,9 +10,9 @@ namespace Wino.Selectors;
 /// </summary>
 public partial class MailItemDisplayModePreviewTemplateSelector : DataTemplateSelector
 {
-    public DataTemplate CompactTemplate { get; set; }
-    public DataTemplate MediumTemplate { get; set; }
-    public DataTemplate SpaciousTemplate { get; set; }
+    public DataTemplate? CompactTemplate { get; set; }
+    public DataTemplate? MediumTemplate { get; set; }
+    public DataTemplate? SpaciousTemplate { get; set; }
 
     protected override DataTemplate SelectTemplateCore(object item, DependencyObject container)
     {
@@ -20,11 +21,11 @@ public partial class MailItemDisplayModePreviewTemplateSelector : DataTemplateSe
             switch (mode)
             {
                 case MailListDisplayMode.Spacious:
-                    return SpaciousTemplate;
+                    return SpaciousTemplate ?? throw new ArgumentException(nameof(SpaciousTemplate));
                 case MailListDisplayMode.Medium:
-                    return MediumTemplate;
+                    return MediumTemplate ?? throw new ArgumentException(nameof(MediumTemplate));
                 case MailListDisplayMode.Compact:
-                    return CompactTemplate;
+                    return CompactTemplate ?? throw new ArgumentException(nameof(CompactTemplate));
             }
         }