using (var ctx = new CompanyModelContainer())
            {
                var adr = new Address
                {
                    Street = textBox2.Text,
                    Number = Convert.ToInt16(textBox3.Text),
                    Code = textBox4.Text,
                    City = textBox5.Text,
                    Country = textBox6.Text
                };

                ctx.Addresses.Add(adr);
                ctx.SaveChanges();
            }