clearing code

TicketSystem/Tickets/Adult.cs

@@ -1,17 +1,7 @@
 namespace TicketSystem.Tickets
 {
-    public class Adult: Ticket
+    public class Adult
     {
-        public int price { get; }
-
-        public Adult()
-        {
-            price = 20;
-        }
-
-        public int PriceWithReduction()
-        {
-            return price - price/100*20;
-        }
+        
     }
 }

TicketSystem/Tickets/Child.cs

@@ -1,6 +1,6 @@
 namespace TicketSystem.Tickets
 {
-    public class Child: Ticket
+    public class Child
     {
         public int price { get; }
 
@@ -8,10 +8,5 @@
         {
             price = 5;
         }
-        
-        public int PriceWithReduction()
-        {
-            return 2;
-        }
     }
 }

TicketSystem/Tickets/Student.cs

@@ -1,17 +1,7 @@
 namespace TicketSystem.Tickets
 {
-    public class Student: Ticket
+    public class Student
     {
-        public int price { get; }
         
-        public Student()
-        {
-            price = 10;
-        }
-
-        public int PriceWithReduction()
-        {
-            return 10-3;
-        }
     }
 }

TicketSystem/Tickets/Ticket.cs

@@ -7,9 +7,13 @@
         Adult
     }
 
-    public interface Ticket
+    public class Ticket
     {
-        int price { get; }
-        int PriceWithReduction();
+        private int price { get; }
+
+        public Ticket()
+        {
+            price = 20;
+        }
     }
 }