EF core added

SanSystem/KlassenBIB/DBModel.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace KlassenBIB
+{
+    public abstract class DBModel
+    {
+        public int Id { get; set; }
+    }
+}