c# - 如何在 C# 中发送 html 内容以发送网格电子邮件

Question

我正在尝试使用 c# 库通过发送网格发送电子邮件。下面是我的代码

var apiKey ="xxxxxxxxx";//dumy
var client = new SendGridClient(apiKey);
var from = new EmailAddress("[e-mail]", "Example User");
var subject = "Sending with SendGrid is Fun";
var to = new EmailAddress("[e-mail]", "Example User");
var plainTextContent = "and easy to do anywhere, even with C#";
var ww = "www.google.com";
var email = "[e-mail]"

var htmlContent = string.Format(@"<strong>Hi{0}</strong>
<p>You are invited to  signup in  portal.You can signup using below signup button</p>
<p><a href={1}>Visit W3Schools.com!</a></p>",email,ww);
var msg = MailHelper.CreateSingleEmail(from, to, subject, plainTextContent, htmlContent);     
var response =  client.SendEmailAsync(msg).GetAwaiter().GetResult();
            
    

我将 html 内容转换为字符串并执行代码。但是没有收到电子邮件。我的代码有什么问题吗？。在我收到电子邮件之前 htmlContent 是

<strong>嗨</strong>

标签： c#sendgrid