/// <summary>
/// 实例化邮件操作对象
/// </summary>
/// <param name="mail">收件人</param>
public MailHelper(string mail, UserContext userContext)
{
To = mail;
MailBody = $"验证码：{UserServer.GetVerificationCode(mail, userContext)}";
}
/// <summary>
/// 实例化邮件操作对象
/// </summary>
/// <param name="mail">收件人</param>
public MailHelper(string mail, UserContext userContext)
{
To = mail;
MailBody = $"验证码：{UserServer.GetVerificationCode(mail, userContext)}";
}