C# to run stored procedure after parsing text

       char[] sSeparators = { ',', ' ' };
       string[] sStocks = txtStocks.Text.Split(sSeparators);
       SqlConnection conn = new SqlConnection("AttachDbFilename=|DataDirectory|\\ASPNETDB.MDF;User Instance=True;Data Source=.\\SQLEXPRESS;Integrated Security=True;");
       System.Data.SqlClient.SqlCommand command = new System.Data.SqlClient.SqlCommand("sproc_aspnet_CreateStockInList", conn);
       command.CommandType = System.Data.CommandType.StoredProcedure;
       conn.Open();
       foreach (string _stock in sStocks)
       {
           command.Parameters.AddWithValue("@ListId", txtListId.Text.Trim());
           command.Parameters.AddWithValue("@Symbol", _stock.Trim());
           command.ExecuteNonQuery();
           command.Parameters.Clear();
       }
       conn.Close();