Facing issue while installing NuGet package of square in visual stdio

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Error Could not install package 'Square 4.0.0'. You are trying to install this package into a project that targets '.NETFramework,Version=v4.5', but the package does not contain any assembly references or content files that are compatible with that framework. For more information, contact the package author.

I have website of version 4.5 and i am trying to install square payment gateway package on my website but it shows me this error, i can't change my version of website becasue its running, can some one please help me in this issue> this packge is easily insatll on version 8.0 but not instal on 4.5 , there are several version availble of square but no one install on version 4.5

What I have tried:

i tried to install different version but can success.

Posted 14-Feb-21 20:14pm

Member 14976405

Updated 15-Feb-21 22:21pm

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OriginalGriff · Answer 1 · 2021-02-14T20:45:00

Solution 1

Read the error message: it's telling you exactly what the problem is.
Your project framework is not compatible with the version you are trying to install.
The only solution to that is to either find out what version the package supports and change your project to match, or get a version that matches your project.

Either way, as the error tells you very explicitly: "For more information, contact the package author"
So do that!

Posted 14-Feb-21 20:45pm

OriginalGriff

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Member 14976405 15-Feb-21 4:32am

yes i know, i just post question is there any other solution without changing version of project i can hendle,

OriginalGriff 15-Feb-21 5:07am

No. When you start your app a particular version of the framework is loaded - if that version is not compatible with the version in a reference, then it can't run, and your app will fail.
To prevent that, VS won't let you reference an incompatible assembly.

Richard Deeming · Answer 2 · 2021-02-15T22:21:00

NuGet Gallery | Square 4.0.0[^]
Dependencies:
.NETStandard 1.3
NETStandard.Library (>= 1.6.1)
Newtonsoft.Json (>= 12.0.3)

The only supported frameworks are those that conform to .NET Standard 1.3 - according to Microsoft[^], that means your application needs to target .NET Framework 4.6 at a minimum.

If you can't change the target framework of your application, then you can't use that package.

NB: .NET Framework 4.5 is quite old now - it was release 8½ years ago. Support for 4.5 and 4.5.1 ended in 2016, so you'd need to be on at least 4.5.2 to continue getting security patches. Most machines should be on at least 4.7.2, and preferable 4.8.