ΜΕΘΟΔΟΙ

1)

using System;

namespace MyApplication
{
  class Program
  {
    static void MyMethod(string fname) 
    {
      Console.WriteLine(fname + " Refsnes");
    }

    static void Main(string[] args)
    {
      MyMethod("Liam");
      MyMethod("Jenny");
      MyMethod("Anja");
    }  
  }
}

2)sing System;

namespace MyApplication
{
  class Program
  {
    static void MyMethod(string country = "Norway")
    {
      Console.WriteLine(country);
    }

    static void Main(string[] args)
    {
      MyMethod("Sweden");
      MyMethod("India");
      MyMethod();
      MyMethod("USA");
    }
  }
}

3)using System;

namespace MyApplication
{
  class Program
  {
    static void MyMethod(string fname, int age)
    {
      Console.WriteLine(fname + " is " + age);
    }

    static void Main(string[] args)
    {
      MyMethod("Liam", 5);
      MyMethod("Jenny", 8);
      MyMethod("Anja", 31);
    }
  }
}

4)using System;

namespace MyApplication
{
  class Program
  {
    static int MyMethod(int x)
    {
      return 5 + x;
    }

    static void Main(string[] args)
    {
      Console.WriteLine(MyMethod(3));
    }
  }
}

5)using System;

namespace MyApplication
{
  class Program
  {
    static int MyMethod(int x, int y)
    {
      return x + y;
    }

    static void Main(string[] args)
    {
      int z = MyMethod(5, 3);
      Console.WriteLine(z);
    }
  }
}

6)