Formatting e-mail body HTML

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How would I go about making the body work with HTML format. what do I need to add and what line would I need to add it? I have tried MailMessage.IsBodyHtml = true; but that did

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遇见更好的自我

2021-01-26 01:30
The HTML document you are creating isn't valid. E.g. you are opening two tags, but never close them. Also as far as I can tell your inline-styles aren't valid (unless there is something I am missing here).

This line also looks like it should throw an error, when you are trying to run the program:
```
body = <font size = "20" color = "red" style = "text-align:center;" > "ATTENTION\n\n" </ font >< br > +
```
Instead of using string concatenation which is error prone and often leads to missing closing tags and other issues, an easy solution I sometimes use is to set up a valid HTML-template (e.g. in a resource file) that is populated by placeholders:
```
<!DOCTYPE html>
<html>
<head>
    <style>
        .attention {
            text-align: center;
            font-size: 20px;
            color: red;
        }
        .content {{
            color: black;
            font-size: 10px;
        }}
    </style>
</head>
<body>
<p class="attention">[PLACEHOLDER_TITLE]</p>

<p class="content">[PLACEHOLDER_CONTENT]</p>

<ol>
  <li>[PLACEHOLDER_LIST_ITEM_1]</li>
  <li>[PLACEHOLDER_LIST_ITEM_2]</li>
  <li>[PLACEHOLDER_LIST_ITEM_3]</li>
</ol>
</body>
</html>
```
These can then easily be replaced with the actual content later on and make the code much easier to read:
```
string body = (String)GetLocalResourceObject("EmailTemplate");
body.Replace("[PLACEHOLDER_TITLE]", title);
body.Replace("[PLACEHOLDER_CONTENT]", content);
...
```
Just to be clear: In your actual application you have to make sure that all characters are correctly escaped (in both the template and the replacement strings you are inserting into it).
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