private void btnOK_Click(object sender, EventArgs e)
        {
            int countError = 0;

            //if(CheckError.CheckErrors(tbLogin))
            //{
            //    countError++;
            //}
            //if(CheckError.CheckErrors(tbPassword))
            //{
            //    countError++;
            //}
            //if(CheckError.CheckErrors(tbRepeatPassword))
            //{
            //    countError++;
            //}
            //if(CheckError.CheckErrors(tbEmail))
            //{
            //    countError++;
            //}
            //if(CheckError.CheckErrors(tbPassword,tbRepeatPassword))
            //{
            //    countError++;
            //}
            if (WorkingWithDB.Registration(tbLogin, tbEmail) == 0)
            {
                MessageBox.Show("OK");
            }

            if (countError == 0)
            {
                DialogResult = DialogResult.OK;
            }
        }