Referencing Microsoft interop dll issue

Yash

6y7.1kC#

I am writing a pgm to read outlook-2016 mails from windows7 on VS2019 IDE with .net core framework on C# console app. I have used the code available at https://www.youtube.com/watch?v=zt2HbqwR-WI for Building the code has no issue. but while running i am getting below issue related to referencing dlls. I tried two versions of interop library and added reference manually as well as via manage nuget. But the same error always:

"An unhandled exception of type 'System.IO.FileNotFoundException' occurred in ReadMailProject.dll Could not load file or assembly 'office, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c'. The system cannot find the file specified."

when i referenced Version=9.6.0.0 of interop……..

"An unhandled exception of type 'System.IO.FileNotFoundException' occurred in ReadMailProject.dll
Could not load file or assembly 'Interop.Microsoft.Office.Interop.Outlook, Version=9.6.0.0, Culture=neutral, PublicKeyToken=null'. The system cannot find the file specified."

Thanks in advance,

Yashaswini

3 Replies

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Jefferson S. Motta6y ago
The outlook project should be x86 or x64 like the installed Outlook on your machine.
Sankar B6y ago
Hi Yash,

If you are using Mircosoft.office.Interop, it will search for DLL in GAC folder and Microsoft should be installed in your machine. Else Try to Register the DLL in GAC and try running your code.

I would suggest you to Microsft.Exahnge.Webservice to read from outlook.This will not be required Microsoft to be installed in your machine.

Thanks
Ramesh Palanivel6y ago
Hi Yash,

Is your microsoft product has valid license? I had the same issue few months back , Then I applied the valid license key and its worked for me.

Please check your product license issue and try. :)