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 ComboBox_Data_Add_Remove
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Add_Button(object sender, EventArgs e)
        {  
            
            comboBox1.Items.Add(textBox1.Text);
            
        }

        private void Remove_Button(object sender, EventArgs e)
        {  
            
            comboBox1.Items.Remove(textBox1.Text);
            
        }

        private void Add_Button(object sender, EventArgs e)
        {  
            
            comboBox2.Items.Add(textBox2.Text);
            
        }

        private void Remove_Button(object sender, EventArgs e)
        {  
            
            comboBox2.Items.Remove(textBox2.Text);
            
        }

        private void  > _Button(object sender, EventArgs e)
        {  
            
            comboBox2.Items.Add(comboBox1.Text);
            comboBox1.Items.Remove(comboBox1.Text);
            
        }

        private void  < _Button(object sender, EventArgs e)
        {  
            
            comboBox1.Items.Add(comboBox2.Text);
            comboBox2.Items.Remove(comboBox2.Text);
            
        }
    }
}