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Editorial Team
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Asked: 2026-05-11T16:55:31+00:00

Scenario : I have an ASP.NET MVC application developed in Visual Studio 2008. There

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Scenario: I have an ASP.NET MVC application developed in Visual Studio 2008. There is a root folder named “Content” that stores images and stylesheets. When I run locally (using Cassini) and browse my application, every resource from the “Content” directory is always downloaded. Using Firebug, I can verify that the web server returns an HTTP 200 (“ok”).

Desired: I would like for Cassini to return HTTP 304 (“not modified”) instead of 200. This is the behavior when running the site under IIS7.

Reasoning: The site I am working on has a large number of static resources (often as many as 40 per page). Browsing the site is very fast on IIS7, because these resources are (correctly) cached by the browser. However, browsing the site on my local machine is painfully slow.

Pages that render in under 1 second on IIS7 take over 30 seconds to render on Cassini. It’s actually faster for me to upload the entire website every few minutes and test from there. (Yes, I recognize that this is perverse and crazy.)

So: how can I instruct/trick Cassini into treating the “Content” directory like IIS7 does?

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1 Answer

  1. Editorial Team

    Are you sure the problem is caching? Because the content does get cached correctly on my machine when I run the application on Cassini.

    I think the problem you’re having could be Firefox’s under-performance with resolving IPv6 addresses, which causes a very annoying delay on loads with addresses like http://localhost:55555.

    What I did to change this behaviour was to change the network.dns.disableIPv6 preference on about:config to true on Firefox. I suggest trying that.

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