，下载jmail组件，可以直接安装；也可以找到jmail.dll，手动注册组件。命令行环境下，到jmail.dll所在目录，运行regsvr32 jmail.dll，C＃程序中，行首加上using jmail,如下：(点击btnSend按钮后发送邮件) -, Download jmail components can be installed directly also be found jmail.dll, manually register the component. Command

编写发送邮件的代码，C#语言编写。编写发送邮件的代码，C#语言编写。(Write the code to send mail,C #languag;Write the code to send mail,C#language;)