Posts: 3
Joined: Sat Aug 15, 2020 6:28 pm

VSTO Add-in insteller Error

Sat Aug 15, 2020 9:21 pm

Hi Guys,

I'm new for Advanced Installer, be gentle to me, please :) I have VSTO Add-in Word Document (2019 Off.Pro) and Visual Studio 2019 (
I'd like to create the setup for my project, I tried (step by step: https://www.advancedinstaller.com/user- ... addin.html)
but I stuck on step 5.
with error: Exception calling ".ctor" with "1" arguments(s):"Could not load file or assembly'System.Runtime.CompilerService.Unsafe, Version=,Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependecies. The system cannot find the file specified".

I tried for example VSTO projet but it's doesn't work too.
So, what's next?


Posts: 4330
Joined: Wed Jun 13, 2018 7:49 am

Re: VSTO Add-in insteller Error

Wed Aug 19, 2020 3:00 pm

Hello Mick,

I have answered your other forum thread here:

Import Visual Studio Project Exception calling

Best regards,
Catalin Gheorghe - Advanced Installer Team
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