Hi,
Please use this code. Note. It wil allow only to display. If you want to type then you need to add a Keyboard of Urdu Font in your Windows.
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<style type="text/css">
@import url(https://fonts.googleapis.com/earlyaccess/notonaskharabic.css);
input
{
font-family: 'Noto Naskh Arabic' , serif;
font-size: 10pt;
direction: rtl;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="TextBox1" runat="server" Text = "جشن ٖآزادی مبارک" />
</div>
</form>
</body>
</html>
Screenshot