diff --git a/WinForms/WinForms/FormMain.cs b/WinForms/WinForms/FormMain.cs
index 6224f4a..db03804 100644
--- a/WinForms/WinForms/FormMain.cs
+++ b/WinForms/WinForms/FormMain.cs
@@ -68,7 +68,7 @@ namespace WinForms
             var service = Program.ServiceProvider?.GetService(typeof(FormOrder));
             if (!(service is FormOrder form)) return;
 
-            var selectedOrder = TreeView.GetNode(typeof(OrderBindingModel));//ошибка
+            var selectedOrder = TreeView.GetNode(typeof(OrderBindingModel));
 
             if (selectedOrder != null)
             {
diff --git a/WinForms/WinForms/FormOrder.cs b/WinForms/WinForms/FormOrder.cs
index 166b32c..143a2ed 100644
--- a/WinForms/WinForms/FormOrder.cs
+++ b/WinForms/WinForms/FormOrder.cs
@@ -81,6 +81,7 @@ namespace WinForms
                 return;
             }
             string? amount = controlInputNullableInt1.Value.ToString();
+            if (controlInputNullableInt1.Value == null) amount = null;
 
             try
             {