class TimePeriod
{
  private double seconds;

  public double Hours
  {
    get { return seconds / 3600; }
    set { seconds = value * 3600; }
  }
}


class Program
{
  static void Main()
  {
    TimePeriod t = new TimePeriod();

    // Assigning the Hours property causes the 'set' accessor to be called.
    t.Hours = 24;

    // Evaluating the Hours property causes the 'get' accessor to be called.
    System.Console.WriteLine("Time in hours: " + t.Hours);
  }
}

Time in hours: 24

public string Name => First + " " + Last; 

public class Date
{
  private int month = 7; // Backing store

  public int Month
  {
    get
    {
      return month;
    }
    set
    {
      if ((value > 0) && (value < 13))
      {
        month = value;
      }
    }
  }
}

class Person
{
  private string name; // the name field
  public string Name  // the Name property
  {
    get
    {
      return name;
    }
  }
}

Person person = new Person();
//...

System.Console.Write(person.Name); // the get accessor is invoked here

private int number;
public int Number
{
  get
  {
    return number++;  // Don't do this
  }
}

class Employee
{
  private string name;
  public string Name
  {
    get
    {
      return name != null ? name : "NA";
    }
  }
}

class Person
{
  private string name; // the name field
  public string Name  // the Name property
  {
    get
    {
      return name;
    }
    set
    {
      name = value;
    }
  }
}

Person person = new Person();
person.Name = "Joe"; // the set accessor is invoked here        

System.Console.Write(person.Name); // the get accessor is invoked here

public class Employee
{
  public static int NumberOfEmployees;
  private static int counter;
  private string name;

  // A read-write instance property:
  public string Name
  {
    get { return name; }
    set { name = value; }
  }

  // A read-only static property:
  public static int Counter
  {
    get { return counter; }
  }

  // A Constructor:
  public Employee()
  {
    // Calculate the employee's number:
    counter = ++counter + NumberOfEmployees;
  }
}

class TestEmployee
{
  static void Main()
  {
    Employee.NumberOfEmployees = 107;
    Employee e1 = new Employee();
    e1.Name = "Claude Vige";

    System.Console.WriteLine("Employee number: {0}", Employee.Counter);
    System.Console.WriteLine("Employee name: {0}", e1.Name);
  }
}

  Employee number: 108
  Employee name: Claude Vige

public class Employee
{
  private string name;
  public string Name
  {
    get { return name; }
    set { name = value; }
  }
}

public class Manager : Employee
{
  private string name;

  // Notice the use of the new modifier:
  public new string Name
  {
    get { return name; }
    set { name = value + ", Manager"; }
  }
}

class TestHiding
{
  static void Main()
  {
    Manager m1 = new Manager();

    // Derived class property.
    m1.Name = "John";

    // Base class property.
    ((Employee)m1).Name = "Mary";

    System.Console.WriteLine("Name in the derived class is: {0}", m1.Name);
    System.Console.WriteLine("Name in the base class is: {0}", ((Employee)m1).Name);
  }
}

  Name in the derived class is: John, Manager
  Name in the base class is: Mary

public new string Name

((Employee)m1).Name = "Mary";

abstract class Shape
{
  public abstract double Area
  {
    get;
    set;
  }
}

class Square : Shape
{
  public double side;

  public Square(double s) //constructor
  {
    side = s;
  }

  public override double Area
  {
    get
    {
      return side * side;
    }
    set
    {
      side = System.Math.Sqrt(value);
    }
  }
}

class Cube : Shape
{
  public double side;

  public Cube(double s)
  {
    side = s;
  }

  public override double Area
  {
    get
    {
      return 6 * side * side;
    }
    set
    {
      side = System.Math.Sqrt(value / 6);
    }
  }
}

class TestShapes
{
  static void Main()
  {
    // Input the side:
    System.Console.Write("Enter the side: ");
    double side = double.Parse(System.Console.ReadLine());

    // Compute the areas:
    Square s = new Square(side);
    Cube c = new Cube(side);

    // Display the results:
    System.Console.WriteLine("Area of the square = {0:F2}", s.Area);
    System.Console.WriteLine("Area of the cube = {0:F2}", c.Area);
    System.Console.WriteLine();

    // Input the area:
    System.Console.Write("Enter the area: ");
    double area = double.Parse(System.Console.ReadLine());

    // Compute the sides:
    s.Area = area;
    c.Area = area;

    // Display the results:
    System.Console.WriteLine("Side of the square = {0:F2}", s.side);
    System.Console.WriteLine("Side of the cube = {0:F2}", c.side);
  }
}

  Enter the side: 4
  Area of the square = 16.00
  Area of the cube = 96.00

  Enter the area: 24
  Side of the square = 4.90
  Side of the cube = 2.00