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.NET 4.0 Reference could not be resolved

Hi there

I am currently trying to integrate Dropbox into a bigger system running .NET 4.0, the issue is that when I install the Dropbox.Net NuGet into my class library and rebuild the solution, I receive the following errors, from another library that references it.

Severity Code Description Project File Line Suppression State
Warning The primary reference "location/DropboxProject.dll" could not be resolved because it has an indirect dependency on the framework assembly "System.Runtime, Version=1.5.11.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" which could not be resolved in the currently targeted framework. ".NETFramework,Version=v4.0". To resolve this problem, either remove the reference "location/DropboxProject.dll" or retarget your application to a framework version which contains "System.Runtime, Version=1.5.11.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a". Easy2u.PCS

Severity Code Description Project File Line Suppression State
Warning The primary reference "location/DropboxProject.dll" could not be resolved because it has an indirect dependency on the framework assembly "System.Threading.Tasks, Version=1.5.11.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" which could not be resolved in the currently targeted framework. ".NETFramework,Version=v4.0". To resolve this problem, either remove the reference "location/DropboxProject.dll" or retarget your application to a framework version which contains "System.Threading.Tasks, Version=1.5.11.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a". Easy2u.PCS

Severity Code Description Project File Line Suppression State
Warning The primary reference "location/DropboxProject.dll" could not be resolved because it has an indirect dependency on the framework assembly "System.Net.Http, Version=1.5.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" which could not be resolved in the currently targeted framework. ".NETFramework,Version=v4.0". To resolve this problem, either remove the reference "location/DropboxProject.dll" or retarget your application to a framework version which contains "System.Net.Http, Version=1.5.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a". Easy2u.PCS

I figured it has to do with the fact that the Class Library that uses my Dropbox Project, is using older versions of those 3 dependencies, is there a way to solve this issue?

Thank you for the help.

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Comments

Greg-DB

I'm not sure offhand what the cause of this would be or how to solve it. Are you able to remove the reference or retarget the application, per the error message?

In any case, what version of Visual Studio are you using?

Also, there are some posts here that may be helpful:

https://stackoverflow.com/questions/16756186/system-net-http-could-not-be-resolved-in-the-currently-targeted-framework-net-4
https://stackoverflow.com/questions/26918631/dependency-on-the-framework-assembly-system-runtime-version-4-0-10-0-which-c

Nicodk

I figured out that it is because the second Class Library also needs the Microsoft.Bcl.Build nuget/reference in order to work.

But thanks for your time

ManikandanIndia

Dear Nicodk,

I too have the same problem now. How did you resolve it? How to did you make the second class library to get with Microsoft.Bcl.Build nuget/reference?

I am delibrately in need of your help.

Greg-DB

@ManikandanIndia I'm afraid I can't offer much help with this since this is more about managing dependencies in Visual Studio/NuGet/.NET as opposed to using the Dropbox API itself, but maybe @Nicodk can offer some advice.

Otherwise, there are some posts with detials and fixes for similar errors that may be useful: