当我尝试向母版页中的 html 标记添加属性时：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" id="primtag" runat="server">
就像后面的代码一样：
prmimaryhtml_tag.Attributes.Add("lang", "en")
我收到此错误：
Parser Error
Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.
Parser Error Message: The base class includes the field 'primtag', but its type (System.Web.UI.HtmlControls.HtmlElement) is not compatible with the type of control (System.Web.UI.HtmlControls.HtmlGenericControl).
Source Error:
Line 4:
Line 5: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
Line 6: <html xmlns="http://www.w3.org/1999/xhtml" id="primtag" runat="server">
Line 7: <head id="Head1" runat="server">
Line 8: <title></title>
Source File: /main.master Line: 6
我也检查过main.master.designer.vb它保留了这一行：
Protected WithEvents primtag As Global.System.Web.UI.HtmlControls.HtmlElement
现在，最奇怪的事情是：这段代码在我的本地计算机上工作正常，但在我的生产服务器上工作不正确。我也不知道是什么导致了这种不同的行为。
我还看了这个帖子：在 C# 中设置页面主 html 标签 https://stackoverflow.com/questions/6024378/set-pages-main-html-tag-in-c-sharp/6024448
UPDATE当我的情况如下：
main.master.designer.vb
Protected WithEvents primtag As Global.System.Web.UI.HtmlControls.HtmlElement
main.master.aspx
<html xmlns="http://www.w3.org/1999/xhtml" ID="primtag" runat="server">
main.master.aspx.vb
评论了这一行：
'primtag.Attributes.Add
I get:
Parser Error
Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.
Parser Error Message: The base class includes the field 'primtag', but its type (System.Web.UI.HtmlControls.HtmlElement) is not compatible with the type of control (System.Web.UI.HtmlControls.HtmlGenericControl).
Source Error:
Line 4:
Line 5: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
Line 6: <html xmlns="http://www.w3.org/1999/xhtml" ID="primtag" runat="server">
Line 7: <head id="Head1" runat="server">
Line 8: <title></title>
之后我尝试更改 main.master.designer.vb 文件中的该行Protected WithEvents primtag As Global.System.Web.UI.HtmlControls.HtmlElement to Protected WithEvents primtag As Global.System.Web.UI.HtmlControls.HtmlGenericControl在生产服务器上我得到：
Object reference not set to an instance of an object.
UPDATE 2
这可能与我的解决方案的编译有关，我还检查了这些帖子：
http://briancaos.wordpress.com/2013/08/07/system-web-ui-htmlcontrols-htmliframe-is-not-compatible-with-the-type-of-control-system-web-ui-htmlcontrols-htmlgenericcontrol/
https://connect.microsoft.com/VisualStudio/feedback/details/736011/iframe-parser-error
http://forums.asp.net/t/1884696.aspx?help+required+with+iframes+on+aspx
http://support.microsoft.com/kb/941824
http://forums.asp.net/t/1686949.aspx
然后，我检查本地计算机上的 IIS7.5 设置，应用程序池设置为 ASP.NET4.0，与我的生产服务器上的相同。
我在 Visual Studio 中的目标框架编译设置为 .NET Framework 4.5。
希望这可以为使其发挥作用提供更多见解。请帮忙 ：）
