How to delete an extension

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Posted on by Greg's Mom

Can anyone point me to any documentation or suggest the appropriate way to delete an extension class (or any custom code files for that matter)? I've found on occasion while developing extensions, I may decide that I've gone down the wrong path and I want to remove some code files that I've been working on. If I delete an extension class from the solution explorer, I start getting "object reference is not set to an instance of an object" errors and debugging leads into some kernel stuff that I believe is failing because I removed my extension. Do I need to do a full model build (Dynamics 365 > Build Models) on the model? Is there a better way or any guidance that anyone can give?

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André Arnaud de Cal... 292,907 Super User 2025 Season 1 on at

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RE: How to delete an extension

Hi Brawndo,

When you delete an individual object from a project, you need to build the model. If you only build the solution, it will not consider deleting the old object as they could be part of another solution for the same model.