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I have a project(A) is a normal winform and another project(B) is a vsto addsin for word project screenshot my VSTO adds-in references parts of project B when i make an installation and try to install it the installation gives me an error. error message things i have tried is made a installation for project A and installed it first then tried to install Project B but it gives the same error.

Eugene Astafiev
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yasele6747
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    Are you deploying on a different machine than the one you built the project? The deploy machine is missing the Microsoft Office Addins. – jdweng Jun 14 '21 at 07:17
  • Does this answer your question? [Error deploying ClickOnce application - Reference in the manifest does not match the identity of the downloaded assembly](https://stackoverflow.com/questions/5337458/error-deploying-clickonce-application-reference-in-the-manifest-does-not-match) – Eugene Astafiev Jun 14 '21 at 08:50

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You have to add files from the project A manually to the add-in installer. For your reference, a similar issue is described on the Error deploying ClickOnce application - Reference in the manifest does not match the identity of the downloaded assembly thread.

For VSTO based add-in, make sure that you did all the steps described in the Deploy an Office solution by using ClickOnce article.

Eugene Astafiev
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you can use advanced installer i had the same exact problem but was able to fix it with that https://www.advancedinstaller.com/ this will bundle all your projects.

kunz
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