我最近将我的.net框架从3.5升级到4.0后出现问题:
System.Net.Mail.SmtpException:发送邮件失败.---> System.IndexOutOfRangeException:索引超出了数组的范围.在System.Net.Base64Stream.EncodeBytes(Byte [] buffer,Int32 offset,Int32 count,Boolean dontDeferFinalBytes,Boolean shouldAppendSpaceToCRLF)System.Net.Base64Stream.Write(Byte [] buffer,Int32 offset,Int32 count)at System.Net System.Net.Mail.SmtpClient上的System.Net.Mail.Message.Send(BaseWriter writer,Boolean sendEnvelope)上的System.Net.Mime.MimeMultiPart.Send(BaseWriter writer)中的.Mime.MimePart.Send(BaseWriter writer).发送(MailMessage消息)---内部异常堆栈跟踪结束---
我在这里阅读了这个连接错误列表:http://connect.microsoft.com/VisualStudio/feedback/details/544562/cannot-send-e-mails-with-large-attachments-system-net-mail-smtpclient-system- net-mail-mailmessage.
如果有人关心这个问题,请在Connect上投票,所以它会尽快修复.