using System;

namespace Hierarchy

{

public class Employee

{

  private  string name;

    public virtual string Name //remove public,error:virtual or abstract member cannot be private

    {

        //no access modifiers used here,but in set

        //Rule-2>>You can use accessor modifiers only if the property or indexer has both set and get accessors. 

        //In this case, the modifier is permitted on one only of the two accessors.

        get{

        return  name != null ? name : "NA";

        }

        protected set{} //Rule-4>>The accessibility level on the accessor must be more restrictive than the accessibility level on the property or indexer itself.

    }

}

public class Manager:Employee

{

     string name;

    public Manager(string name)

    {

    this.name=name;

    }

    public override string Name

    {

      get //Rule-3>>If the property or indexer has an override modifier, the accessor modifier must match the accessor of the overridden accessor, if any.

      {

        return  name != null ? name : "NA";

      }

     protected set

     {

         name=value;

     }

    }

}   

public class HierarchyTest

{

public static void Main()

    {

      Employee e=new Employee();

      Manager m=new Manager("Bhanuja");

      //e.name="sachi";//if set accessor of the parent property or child property has protected accessibility level,e.name is inaccessible due to its protection level

    Console.WriteLine("Employee:{0}",e.Name);

    Console.WriteLine("Manager:{0}",m.Name);

    }

}   

}