.dll oluşturma ve c# da o degerlere deger gonderip çekme

1-)File->new Project->Class Library de ve aşşağıdaki kodu yaz

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace Dll_yaz1

{

    public class Class1

    {

        public int topla(int a,int b)

        {

            return a + b;

        }

    }

}

2-)File->new Project->Windows Forms Application de ve aşşağıdaki kodu yaz

2.1-)project->add referance->solution->dll_yaz1 i ekle sonra aşşağıdakini yaz

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace dll_cagir

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)

        {

            Dll_yaz1.Class1 s = new Dll_yaz1.Class1();

            Console.WriteLine(  s.topla(2, 1));

            button1.Text = s.topla(2, 1)+"";

        }

    }

}