Возврат к основной форме (но есть ошибка при запуске...)

Pf2eViewer/DatabaseViewerControl.cs

@@ -1,4 +1,5 @@
 using System.ComponentModel;
+using System.Diagnostics.CodeAnalysis;
 using Pf2eModel;
 using Pf2eModel.Model.Base;
 using Pf2eModel.Model.Common.I18n;
@@ -10,13 +11,7 @@ public partial class DatabaseViewerControl : UserControl
 {
     public readonly Pf2eDbContext Context = new();
 
-    private int _perPage = 30;
-
-    private int _page = 1;
-
-    private EntityType _type;
-
-    [DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
+    [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
     public int PerPage
     {
         get => _perPage;
@@ -26,6 +21,7 @@ public partial class DatabaseViewerControl : UserControl
             UpdateView();
         }
     }
+    private int _perPage = 30;
 
     [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
     public int Page
@@ -37,14 +33,7 @@ public partial class DatabaseViewerControl : UserControl
             UpdateView();
         }
     }
-
-    [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
-    public int Count { get; private set; }
-
-    public int MaxPage => Convert.ToInt32(Math.Ceiling(1.0 * Count / PerPage));
-
-    [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
-    public EntityView CurrentEntity { get; private set; } = null!;
+    private int _page = 1;
 
     [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
     public EntityType Type
@@ -56,6 +45,16 @@ public partial class DatabaseViewerControl : UserControl
             UpdateView();
         }
     }
+    private EntityType _type;
+
+    [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
+    public int Count { get; private set; } = 0;
+
+    public int MaxPage => Convert.ToInt32(Math.Ceiling(1.0 * Count / PerPage));
+
+    [AllowNull]
+    [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
+    public EntityView CurrentEntity { get; private set; }
 
     private bool _updating = false;