How to Html.Encode in webforms

Question

I have an ASP.NET Web Forms application. There is a page with TextBoxes and users enter search terms into these which are used to query the database.

I know that I need to prevent JavaScript injection attacks. How do I do this?

In MVC I would use Html.Encode. It doesn't seem to be recognized in Web Forms.

Thanks!

user_2561490 · Answer

In .NET v4.0 and above, you can use the following on Web Forms:

<%
   string notificationIcon = "";
%>
<%: new HtmlString(notificationIcon) %>