封装的SQL数据库访问类

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;