both. you can create any user/custom controls in any CLR languages and used by any application written in CLR language.
到底是USER CONTROL可以跨语言平台还CUSTOM CONTROL可以，众说纷纭
dynamic load User Controls netspring 2005-08-12 05:16
<%@ Page Language="C#" %>
<%@ Register TagPrefix="uc0" TagName="MyUsr" Src="ascx/MyUsr.ascx" %>
<script runat="server">
void Page_Load(object sender, EventArgs e)
{
MyUsr_ascx t =new MyUsr_ascx();
Page.Controls.Add(t);
Response.Write(t.URLParams);
}
</script>
<html>
<head>
</head>
<body>
<form runat="server">
<!-- Insert content here -->
</form>
</body>
</html>
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