新手问题

照书上写dreamweaver 编译得不到想要的效果....
高手帮忙解决一下.
<%@ Page Language="C#" %>
<script language= "C#" runat="server">
void txtuid_textchanged(object sender, EventArgs e)
{
    lbluid.text =txtuid.text;
}
</script>
<form runat="server">
<b>用户名:</b>
<asp:textbox id="txtuid"
    ontextchanged="txtuid_textchanged"
    runat="server"/><br>
    <b>你的用户名为:</b>
    <asp:label id="lbluid"
    runat="server"/>
</from>