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:

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?

CodePudding user response：

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.