我的异步查询数据库 的类

我认为这种方法后面肯定有改进的地方,但是目前位置我不知道 ,希望各位给于指教  

using System;
using System.Collections.Generic;
using System.Text;
using System.Data.SqlClient;
using System.Data;

namespace OperatorDB
{
    public class AsyncSelectData
    {
        /// <summary>
        /// 创建异步执行数据查询
        /// </summary>
        /// <param name="DBConnect">取得链接</param>
        /// <param name="asyncDataAdapter">取得配置器</param>
        public AsyncSelectData(SqlConnection DBConnect, SqlDataAdapter asyncDataAdapter)
        {
            sConnect = DBConnect;
            sDataAdapter = asyncDataAdapter;
        }

        private SqlConnection sConnect;
        private SqlDataAdapter sDataAdapter;
        private    DataTable retDataTable;
        
        private void  SelectData_()
        {
            DataTable Dt=new DataTable();
            #region 执行
            if (sConnect != null)
            {
                sConnect.Open();
                if (sDataAdapter != null)
                {
                    if (Dt != null)
                    {
                        try
                        {
                            sDataAdapter.Fill(retDataTable);
                        }
                        catch (Exception ex)
                        {

                            System.Windows.Forms.MessageBox.Show(ex.Message);
                          
                        }
                    }
                    

                }
              
            }
    
            #endregion
          ;
        }
  
        public void  SelectData(DataTable Dt)
        {
            retDataTable = Dt ;
            System.Threading.Thread t = new System.Threading.Thread(SelectData_);
            t.Start();
            
            do
            {
                System.Threading.Thread.Sleep(0);
                System.Windows.Forms.Application.DoEvents();              
            }
            while (t.ThreadState== System.Threading.ThreadState.Running );
          
        }
    }
}