Added some initiating data for working further in this projekt

CodeFirstExistingDatabase/Category.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CodeFirstExistingDatabase
+{
+    public class Category
+    {
+        public int Id { get; set; }
+        public string Name { get; set; }
+
+    }
+}