Добавил интерфейс бизнес логики письма

SecuritySystem/SecuritySystemContracts/BusinessLogicsContracts/IMessageInfoLogic.cs

@@ -0,0 +1,13 @@
+using SecuritySystemContracts.BindingModels;
+using SecuritySystemContracts.SearchModels;
+using SecuritySystemContracts.ViewModels;
+
+namespace SecuritySystemContracts.BusinessLogicsContracts
+{
+    public interface IMessageInfoLogic
+    {
+        List<MessageInfoViewModel>? ReadList(MessageInfoSearchModel? model);
+        bool Create(MessageInfoBindingModel model);
+    }
+
+}