ΠΙΝΑΚΕΣ
1

using System;

namespace MyApplication
{
  class Program
  {
    static void Main(string[] args)
    {
      string[] cars = {"Volvo", "BMW", "Ford", "Mazda"};
      Console.WriteLine(cars[0]);
    }
  }
}

2)using System;

namespace MyApplication
{
  class Program
  {
    static void Main(string[] args)
    {
      string[] cars = {"Volvo", "BMW", "Ford", "Mazda"};
      cars[0] = "Opel";
      Console.WriteLine(cars[0]);    
    }
  }
}

3)

using System;

namespace MyApplication
{
  class Program
  {
    static void Main(string[] args)
    {
      string[] cars = {"Volvo", "BMW", "Ford", "Mazda"};
      Console.WriteLine(cars.Length);
    }
  }
}

4)using System;

namespace MyApplication
{
  class Program
  {
    static void Main(string[] args)
    {
      string[] cars = {"Volvo", "BMW", "Ford", "Mazda"};
      for (int i = 0; i < cars.Length; i++) {
        Console.WriteLine(cars[i]);
      }
    }
  }
}

5)using System;

namespace MyApplication
{
  class Program
  {
    static void Main(string[] args)
    {
      string[] cars = {"Volvo", "BMW", "Ford", "Mazda"};
      foreach (string i in cars) 
      {
        Console.WriteLine(i);
      }   
    }
  }
}

6)using System;

namespace ArrayApplication {
   class MyArray {
      static void Main(string[] args) {
         int []  n = new int[10]; /* n is an array of 10 integers */
         int i,j;

         /* initialize elements of array n */
         for ( i = 0; i < 10; i++ ) {
            n[ i ] = i + 100;
         }
         
         /* output each array element's value */
         for (j = 0; j < 10; j++ ) {
            Console.WriteLine("Element[{0}] = {1}", j, n[j]);
         }
         Console.ReadKey();
      }
   }
}

7)