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CEFSharp inside AddIn - "Cannot pass GCHandle through AppDomains"

I am programming AddIn for Solid Edge using AddE. With this AddIn, the EdgeBar containing the website should be displayed.

Since I don't want to use the standard Windows Forms WebBrowser control (it only uses the IE rendering engine), I'm trying to use the Chromium Embedded Framework with its .NET CEFSharp bindings ( https://github.com/cefsharp/CefSharp ).

When creating a new Windows Forms application, the CEFSharp control nesting works fine. But when I paste it into my AddIn code, I get the following error after starting Solid Edge with AddIn activated and the program crashes:

An unhandled exception of type 'System.ArgumentException' occurred in mscorlib.dll

Additional information: Can't pass GCHandle through AppDomains.

I found a similar CEFSharp issue related to the AppDomain issue ( https://github.com/cefsharp/CefSharp/issues/351 ), but I really don't see a solution for my issue.

(Notes: Target Framework is .NET Framework 4.5, a type of Class Library. I am using Visual Studio 2013, programming language is C #).

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This pull request ( https://github.com/cefsharp/CefSharp/pull/1556 ) completely solves my problem. Since it hasn't made its way to the CefSharp wizard yet, I built it myself and everything works :-)



Let's assume that it will be on release soon, so you won't have to deal with this problem anymore.

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Got this to work in Excel just in case anyone wants to know https://github.com/cefsharp/CefSharp/issues/1191#issuecomment-215503558



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