private void button1_Click(object sender, EventArgs e) //login haslo
        {
            string connetionString;
            SqlConnection connection;
            string login = textBox1.Text;
            string password = textBox2.Text;
            connetionString = "Data Source="+serverName+";Initial Catalog=GeneralDzordan;User ID=" + login + ";Password=" + password;
            connection = new SqlConnection(connetionString);
            try
            {
                connection.Open();
                MessageBox.Show ("Connection Open!");
                connection.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show("Nie można ustanowić połączenia! \nError: "+ ex.Message);
            }
        }

        private void button2_Click(object sender, EventArgs e) //windows autentyfication
        {
            string connetionString;
            SqlConnection connection;
            string login = textBox1.Text;
            string password = textBox2.Text;
            connetionString = "Data Source="+serverName+";Initial Catalog=GeneralDzordan;User ID=" + login + ";Password=" + password;

            connetionString = "data source=localhost;initial catalog=GeneralDzordan;persist security info=True;Integrated Security=SSPI";


            connection = new SqlConnection(connetionString);
            try
            {
                connection.Open();
                MessageBox.Show ("Connection Open!");
                connection.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show("Nie można ustanowić połączenia! \nError: "+ ex.Message);
            }
        }