1-) C# - Ders 8 combobox

  private void button1_Click(object sender, EventArgs e)

        {

            comboBox1.Items.Add("istanbul");

            comboBox1.Items.Add("ankara");

        }

    }

}

 private void button1_Click(object sender, EventArgs e)

        {

            listBox1.Items.Add("Antalya");

            listBox1.Items.Add("Bursa");


        }

 combobox listbox

 textbox

 checkbox

group box

 label

 button

Combobox edit items