Visual Studio 2008是否支持为浏览器生成的符合HTML 5规范的代码？
Visual Studio本身不会产生太多的HTML代码，这是由System.Web .NET代码完成的。 Visual Studio可以验证你编写的代码，但默认情况下不能验证HTML5。你可以让.NET为你生成HTML5代码，这种情况下你应该编写自己的控制适配器。每个ASP.NET控件都可以通过控件适配器进行扩展，就像ASP.NET团队所做的CSS友好控件适配器一样。
HTML5仍然是一份草案，与SGML没有太多语法差异，但也允许更多像XHTML样式编码（如使用自闭合标签）的方式。
上次我检查时，Visual Studio 2008和2010生成了符合XHTML标准的代码，即具有适当的闭合标记。它没有支持画布和视频，但这也不是你的问题，不是吗？
所以，如果你正在问如何更改HTML和ASPx文件的默认模板，我不知道。但如果你在问HTML和ASPx的设计师是否生成符合代码，那么是的，它可以。
附加：我刚刚在Visual Studio中制作了一个ASP.NET WebApplication，将文档类型更改为<!DOCTYPE html>，并使用HTML5验证在http://validator.w3.org/check上验证输出。
结果：此文档已成功检查为HTML5！
简而言之：是的，VS2008和VS2010直接支持HTML5;-)
如果您关注的是 ASP.NET Webforms 生成的 HTML 输出不合规，则是否考虑使用 ASP.NET MVC？
好处是它使您能够对标记具有绝对控制，因此您可以确保输出符合HTML 5标准的代码。
成本是你失去了ASP.NET webcontrols, viewstate等东西。因此你有一组不同的问题需要考虑和处理。
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