I found the similar questions but no answer
<html>
<body>
<form id="form1" runat="server">
<div>
Text
</div>
<iframe src="FramedPage.aspx" runat="server" />
</form>
</body>
</html>
How to determine that FramedPage.aspx is loaded by iframe on server-side?
I can't use referrer
http header because it doesn't work in some cases for me.
Also I try to access by Parent property but it is null...
Do you have any ideas how I can detect iframe on server-side? Thanks.