sasion3/Form3.cs

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 WindowsFormsApp22222
{
    public partial class Form3 : Form
    {
        public Form3()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            var db = new rewqEntities();
            var data = new Users

            {
                Email = textBox1.Text,
                FirstName = textBox2.Text,
                LastName = textBox3.Text,
                OfficeID = int.Parse(comboBox1.Text),
                Birthdate = DateTime.Parse(textBox4.Text),
                Password = textBox5.Text,
                RoleID = int.Parse(textBox6.Text)
            };

            db.Users.InsertOnSubmit(data);  
            db.SubmitChanges();

        }
        private void button2_Click(object sender, EventArgs e)
        {
            Close();
        }
    }
}