ASP调用C#编写的DLL发送邮件

using System
   using System.Net.Mail
   using System.Text
   namespace IMELS   
{       public class SendMail       
{           public SendMail() 
{ }               private string _to = string.Empty
               /// <
br>
            /// 收件人地址，多个用“,”号隔开            /// <
/br>
            public string To            
{                set 
{ _to = value
 }            }               private string _from = string.Empty
               /// <
br>
            /// 发件人地址            /// <
/br>
            public string From            
{                set 
{ _from = value
 }            }               private string _fromName = string.Empty
               /// <
br>
            /// 发件人显示名称            /// <
/br>
            public string FromName            
{                set 
{ _fromName = value
 }            }               private string _cc = string.Empty
               /// <
br>
            /// 抄送，多个用“,”号隔开            /// <
/br>
            public string CC            
{                set 
{ _cc = value
 }            }               private string _bcc = string.Empty
               /// <
br>
            /// 密抄，多个用“,”号隔开            /// <
/br>
            public string BCC            
{                set 
{ _bcc = value
 }            }               private string _charset = "GB2312"
               /// <
br>
            /// 邮件正文的编码            /// <
/br>
            public string Charset            
{                set 
{ _charset = value
 }            }               private string _contentType = "html"
            /// <
br>
            /// 邮件格式(html or txt)            /// <
/br>
            public string ContentType            
{                set 
{ _contentType = value
 }            }               private string _subject = string.Empty
            /// <
br>
            /// 邮件标题            /// <
/br>
            public string Subject            
{                set 
{ _subject = value
 }            }               private string _body = string.Empty
            /// <
br>
            /// 邮件内容            /// <
/br>
            public string Body            
{                set 
{ _body = value
 }            }               private string _smtp
            /// <
br>
            /// SMTP服务器地址            /// <
/br>
            public string Smtp            
{                set 
{ _smtp = value
 }            }               private string _username
            /// <
br>
            /// SMTP用户名            /// <
/br>
            public string Username            
{                set 
{ _username = value
 }            }            /// <
br>
            /// SMTP密码            /// <
/br>
            private string _password
               public string Password            
{                set 
{ _password = value
 }            }               private int _port = 25
            /// <
br>
            /// SMTP商品            /// <
/br>
            public int Port            
{                set 
{ _port = value
 }            }               /// <
br>
            /// 发送            /// <
/br>
            public void Send()            
{                MailAddress from = new MailAddress(_from, _fromName)
                MailMessage message = new MailMessage()
                message.From = from
                                string[] toadd = _to.Split(',')
                foreach (string _add in toadd)                
{                    try                  
{                        message.To.Add(new MailAddress(_add))
                    }                    catch(Exception e)                    
{                        _error += "To Address Error : " + e.Message + "(" + _add + ")
"
                    }                }                   if (_cc != string.Empty)                
{                       string[] ccadd = _cc.Split(',')
                       foreach (string _add in ccadd)                    
{                        try                      
{                            message.CC.Add(new MailAddress(_add))
                        }                        catch (Exception e)                        
{                            _error += "CC Address Error : " + e.Message + "(" + _add + ")
"
                        }                    }                }                if (_bcc != string.Empty)                
{                    string[] bccadd = _bcc.Split(',')
                       foreach (string _add in bccadd)                    
{                        try                      
{                            message.Bcc.Add(new MailAddress(_add))
                        }                        catch (Exception e)                        
{                            _error += "BCC Address Error : " + e.Message + "(" + _add + ")
"
                        }                    }                }                   message.Sender = from
                message.Subject = _subject
                message.Body = _body