public class UserDA

    {

         SqlConnection conn;

         SqlCommand cmd;

         public UserDA(Use uuu)

         {

             conn =new SqlConnection( "server=" + uuu.Server + ";database=" + uuu.Database + ";user=" + uuu.User + ";pwd=" + uuu.Pwd);

             cmd = conn.CreateCommand();

         }

 public ArrayList Table(string database)

         {

             cmd.CommandText = "Select TABLE_NAME FROM "+database+".INFORMATION_SCHEMA.TABLES Where TABLE_TYPE='BASE TABLE' ";

             conn.Open();

             SqlDataReader dr = cmd.ExecuteReader();

             string a = null;

             if (dr.HasRows)

             {

                 while(dr.Read())

                 {

                     a = dr["TABLE_NAME"].ToString();

                     al.Add(a);

                 }

             }

             cmd.Dispose();

             conn.Close();

             return al;
         }

    public partial class Form2 : Form

    {

        private Use UUU;

        public Form2(Use uuu)

        {

            InitializeComponent();

            UUU = uuu;

        }

        private void Form2_Load(object sender, EventArgs e)

        {

            ArrayList aaa = new UserDA(UUU).Table(UUU.Database);

            for (int y = ; y < aaa.Count; y++)

            {

                comboBox1.Items.Add(aaa[y]);

            }

        }