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Currently I am developing a azure function. I use Net6.0. I have multiple imports. At least one with ftp and one with http.

So I imported both packages via nuget. But if I start my function, the following error occurs:

System.IO.FileNotFoundException: 'Could not load file or assembly 'Microsoft.Extensions.Http, Version=7.0.0.0, Culture=neutral, PublicKeyToken=...'. The system cannot find the file specified.'`

This error is thrown because of a dependency of FluentFTP:

enter image description here

If I downgrade Microsoft.Extensions.Http to Version 6.0.0. The application starts without any error. Or, if I remove the Microsoft.Extensions.Http package, it also works (then the depency has version 2.2.0).

But why is this a problem with the newest version? Is there a way of using all packages with the newest version?

Presi
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1 Answers1

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You are targeting net6.0 and the Microsoft.Extensions.Http dependency you are trying to install is meant for net7.0.

You can check that versions are named according to the .net version - https://www.nuget.org/packages/Microsoft.Extensions.Http/7.0.0#versions-body-tab

That is why you should use Microsoft.Extensions.Http version 6.0.0 or below.

Jaroslav
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  • Oh well, it is that easy. I thougt the version of the packages are randomly like the net version. But thank you! – Presi Dec 23 '22 at 12:14