Исправление пространства имён

Pf2eViewer/EntityTreeViewer/EntityTreeViewerControl.Designer.cs

@@ -1,6 +1,6 @@
-namespace Pf2eViewer;
+namespace Pf2eViewer.EntityTreeViewer;
 
-partial class EntityTreeViewerControl
+sealed partial class EntityTreeViewerControl
 {
     /// <summary> 
     /// Обязательная переменная конструктора.

Pf2eViewer/EntityTreeViewer/EntityTreeViewerControl.cs

@@ -1,9 +1,9 @@
 using System.Data;
 using Pf2eViewer.EntityTreeViewer;
 
-namespace Pf2eViewer;
+namespace Pf2eViewer.EntityTreeViewer;
 
-public partial class EntityTreeViewerControl : UserControl
+public sealed partial class EntityTreeViewerControl : UserControl
 {
     private int _itemHeight = 20;