C# Notlar

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string k = a();
            Console.WriteLine(k);

        }
        private static string a()
        {
            return "merhaba";
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string k = a("dünya");
            Console.WriteLine(k);

        }
        private static string a(string isim)
        {
            return "merhaba "+isim;
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            StreamReader sr = new StreamReader("dnm.txt");
            string yazi = "";
            while (yazi!=null)
            {
                yazi = sr.ReadLine();
                if (yazi!=null)
                {
                    Console.WriteLine(yazi);
                }
            }

            sr.Close();


        }
       
    }
}