您正在看的.Net是:为ASP.NET封装的SQL数据库访问类。 using System; using System.Configuration; using System.Data; using System.Data.SQLClient; using System.Collections; namespace MyCorporation.DepartMent.DataBase {  /// <summary>  /// 通用数据库类  /// </summary>  public class DataBase  {   private string ConnStr = null;   public DataBase()   {    ConnStr = ConfigurationSettings.AppSettings[ConnStr];   }   public DataBase(string Str)   {    try    {     this.ConnStr = Str;    }    catch(Exception ex)    {     throw ex;    }   }   /// <summary>   /// 返回connection对象   /// </summary>   /// <returns></returns>   public SqlConnection ReturnConn()   {    SqlConnection Conn = new SqlConnection(ConnStr);    Conn.Open();    return Conn;   }   public void Dispose(SqlConnection Conn)   {    if(Conn!=null)    {     Conn.Close();     Conn.Dispose();    }    GC.Collect();   }   /// <summary>   /// 运行SQL语句   /// </summary>   /// <param name=SQL></param>   public void RunProc(string SQL)   {    SqlConnection Conn;    Conn = new SqlConnection(ConnStr);    Conn.Open();    SqlCommand Cmd ;    Cmd = CreateCmd(SQL, Conn);    try    {     Cmd.ExecuteNonQuery();    }    catch    {     throw new Exception(SQL);    }    Dispose(Conn);    return;   }      /// <summary>    /// 运行SQL语句返回DataReader   /// </summary>     /// <param name=SQL></param>     /// <returns>SqlDataReader对象.</returns>   public SqlDataReader RunProcGetReader(string SQL)   {    SqlConnection Conn;    Conn = new SqlConnection(ConnStr);    Conn.Open();    SqlCommand Cmd ;    Cmd = CreateCmd(SQL, Conn);    SqlDataReader Dr;    try    {     Dr = Cmd.ExecuteReader(CommandBehavior.Default);    }    catch    {     throw new Exception(SQL);    }    //Dispose(Conn);    return Dr;   }   /// <summary>   /// 生成Command对象   /// </summary>   /// <param name=SQL></param>   /// <param name=Conn></param>   /// <returns></returns>   public SqlCommand CreateCmd(string SQL, SqlConnection  Conn)   {    SqlCommand Cmd ;    Cmd = new SqlCommand(SQL, Conn);    return Cmd;   }     /// <summary>   /// 生成Command对象   /// </summary>   /// <param name=SQL></param>   /// <returns></returns>   public SqlCommand CreateCmd(string SQL)   {    SqlConnection Conn;    Conn = new SqlConnection(Co