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I am able to invoke the method and set up the html file. The issue I'm having is that inside the html file I am using the DOMParser object in a javascript function that I'm calling in C#. It is not defined due to not using an actual browser.

Adding this line to the html file fixes the problem:

<meta http-equiv="X-UA-Compatible" content="IE=edge">

The problem is I want to run the winforms application on an old Virtual Machine that doesn't contain Microsoft Edge..

Is there a way I can manually load the DOMParser object into my html file / javascript funtion?

Caleb McKay
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  • The meta tag you're mentioning is related to Internet Explorer, it means *use the latest version available as the emulation mode*. Not related to Edge (Chromium) browsers, or the previous Edge version – Jimi Jun 05 '23 at 21:56
  • Okay, thanks for the information. I am able to run the app on Windows 10 but unable to run it on Windows 7 or older OS. Any idea why this is the case? – Caleb McKay Jun 06 '23 at 12:32
  • The version of Internet Explorer you have in Windows 7 is not the same as the one you find in Windows 10. In Windows 7, you may also need to [register your executable in the Features Browser Emulation](https://stackoverflow.com/a/38514446/7444103) section of the registry -- Note that [WebView2](https://learn.microsoft.com/en-us/microsoft-edge/webview2/) is available for Windows 7. It would solve all your compatibility problems (all this assuming the Windows 7 System is updated to the last available security patches, otherwise all possible solutions become quite irrelevant) – Jimi Jun 06 '23 at 15:08

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