protected void btnSubmit_Click(object sender, EventArgs e)
        {
            ContactUs newContact = new ContactUs
            {
                Name    = txtName.Text,
                Email   = txtMail.Text,
                Message = txtMessage.Text,
                Subject = txtSubject.Text
            };

            BusinessLayer bl = new BusinessLayer();

            bl.AddNewConatct(newContact);

            txtMail.Text    = "";
            txtMessage.Text = "";
            txtName.Text    = "";
            txtSubject.Text = "";
        }