I want to create a Nuget Package for a C# library that targets .NET Framework 4.0 and higher.
If I put my library in a directory named Net40, will this cause issues for projects that target say 4.1 and higher?
Should i just publish my library in a lib folder without specifying the supported .NET Framework version?
My library supports .NET Framework 4.0 and higher.
The reason why I am asking is that sometimes projects get messed up quickly when they target a different platform whilst the installed libraries via NuGet target another platform version. At least I want to avoid issues when developers target 4.0 and higher.
I hope your advice will be very helpful.
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The question is stupid enough, but it didn’t work with NuGet before. After installing the NuGet package through the console, to connect to PostgreSQL, files appeared that NetFramework should contain. Without copying these files, the project does not start. What to do to get rid of them and not copy them to the directory with the program. In my understanding, these files should be taken from the framework.
See screenshots:
All need files in project C#
My guess is that you have .Net Standard 2.0 libraries/dependencies in your project.
.NET 4.6.1 might add additional runtime dependencies in your output folder:
.NET 4.6.1, 4.6.2, .NET 4.7 and 4.7.1 all have partial .NET Standard
2.0 support in the natively shipped runtimes, but they still are .NET Standard 2.0 compliant by adding additional runtime dependencies into
your output folder to provide the missing functionality. NuGet along
with the runtime targeting handles automatically adding those
dependencies to your projects to provide the needed runtime support
for those extra features. A lot of those assemblies override behavior
from the base framework and .NET uses runtime redirects to route api
calls to the appropriate assemblies rather than than mscorlib.dll or
other system assemblies.
.NET 4.7.2 is the first version of the full .NET Framework that is
fully .NET Standard 2.0 compliant without any additional dependencies.
See: https://weblog.west-wind.com/posts/2019/Feb/19/Using-NET-Standard-with-Full-Framework-NET
In other words, targeting .NET 4.7.2 should get rid of the additional files.
im building an app using c# (not my first. other projects i dont have this problem). this one i included nuget package json
the problem that VS generates too many .dll files in my bin/debug folder (with exe). i don't want these dll files but it seems like the exe doesn't run without them (i coppied the exe to another path and run it)
when i search on the internet all the details about merging using some merge tool but my problem is related VisualStudio in the setting i believe?
This happens when you include a library which targets .NET Standard 1.5 or higher, from a project which targets .NET Framework 4.7.1 or lower.
The .NET Platform Standard table hints at this: it claims that .NET Framework 4.6.1 supports .NET Standard 1.5 or higher, but there's a footnote:
The versions listed here represent the rules that NuGet uses to determine whether a given .NET Standard library is applicable. While NuGet considers .NET Framework 4.6.1 as supporting .NET Standard 1.5 through 2.0, there are several issues with consuming .NET Standard libraries that were built for those versions from .NET Framework 4.6.1 projects. For .NET Framework projects that need to use such libraries, we recommend that you upgrade the project to target .NET Framework 4.7.2 or higher.
One of these issues is that you'll get a lot of extra DLLs, apparently because .NET Framework 4.6.1 only has partial support for .NET Standard 1.5.
The solution is for your project to target .NET Framework 4.7.2, or .NET Core.
I have been trying to add the Square.Connect nuget package so that I can integrate with the square up payment system.
When I am trying to add the package I am getting an error:
"Could not install package 'Square.Connect 2.14.0'. 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 tried on a new application using .net 3.5 and .net 2.0 but I get the same error but with the changed target version.
Has anyone been able to get around this or can you advise me what I maybe doing wrong?
According to nuget.org https://www.nuget.org/packages/Square.Connect/ the Square.Connect package is for .NETStandard 2.0. So you should target that. Hint: Expand dependencies on the nuget page, to see what it requires.
This package is incompatible with your project.
You should target .NET Standard 2.0 or .NET Full Framework 4.6.1 or higher.
Both can work with .NET Standard 2.0 assemblies.
.NET Core 2.0 too, but that's not usefull for you, I guess!
As Palle Due's answer says, the package information page for the most recent version of the package lists .NET Standard 2.0 as a dependency. Therefore, your project must target something compatible with .NET Standard 2.0. This table lists several compatible runtimes, such as .NET Framework 2.6.1 or higher, .NET Core 2.0 or higher, as Schwarzie2478's answer listed (but he didn't give source information, which I think is useful). The table also lists minimum versions for some other runtimes like Xamarin's Android/iOS, or Unity game engine.
However, if you look at some older versions of the package, 2.10.1.297 and earlier depend on .NET Framework 4.5. Therefore, if for some reason you can't target a newer version of the .NET Framework, you could use these older versions of the package. Although I don't know any reason why anyone would be stuck on such an old version of the Framework. .NET Framework lifecycle is complex and very difficult to find a table with actual dates, but my guess is that no supported server operating system is limited to .NET Framework 4.5, so any server installing security updates will probably be on .NET Framework 4.6.x or more likely 4.7.x, so I really don't see any good reason to stay on net45.
I have a Xamarin Forms project and the majority of times that I want to install a nuget package I have an error saying that:
Install-Package : Could not install package 'Microcharts 0.7.1-pre'. You are trying to install this package into a project that targets
'.NETPortable,Version=v4.5,Profile=Profile259', but the package does not contain any assembly references or content files that are compatible with that framework.
I Assume I can work this out by changing the project .net framework target. But when I go and change it, I get an error saying that it cannot change the target because that implies upgrading nuget to 3.0 and It can´t do that.
So my question is: Which is the best way(and simplest) to change the target framework so I have less problems like above with nuget packages.
This library was built to target .NETStandard v1.4. You are trying to use it in a PCL project, that is not possible. PCL is on the way out as the previous not-so-good way to build cross-platform libraries, .NETStandard is the new way.
There is no older version available of this library, rebuilding it from source is a possible option. But realistically it is time to move on to avoid hitting this wall over and over again, you need to update your tooling so you can consume these kind of libraries. The VS2017 Community edition is freeware.
It is time to go from your
.NET PCL Library to an appropriate .NET Standard Library.
Here are some links concerning the migration to .NET Standard.
Upgrade PCL to .NET Standard Class Library
.NET Standard 2.0 Support in Xamarin.Forms
Converting PCL (Portable Class Libraries) to .NET Standard Class Libraries
.NET Standard - PCL Compatibility
.NET Standard Implementation Support
My Suggestion concerning the version of the .NET Standard to use.
If you don't care about backwards compatibility (You want to use the latest OS and SDKs) go all the way to .NET Standard 2.
If you want to have a good backward compatibility you should go on .NET Standard 1.1 - 1.5.
On most projects i use 1.4 - 1.5.
So I have a DLL which is targeting multiple versions (.net 4.5, 4.6.1, netcore 2.0) which is pushed to a Klonkdike
Now I want to use this DLL, my project is .net 4.6.1, so I expect to resolve dependencies on this target only.
However my packages.config gets all .netcore dependencies. How can I prevent that?
This is the DLL:
And this is what is added when fetch this package:
I would expect to have only UAParser to be added and no other change since I already have the dependencies.
There are 3 folders in the lib folders of the package, so I would expect to only need these specific dependencies...
How can I avoid add all these dependencies?
UAParser is a pure .NET Standard based library.
.NET Standard versions lower than 2.0 depend on these libraries. However, the new tooling in VS 2017 (make sure you have at least 15.5.0) trims out these packages during build and makes sure the right assemblies are in place (these may also be System.* dll files but are not coming from these packages).
These dlls put in place by tooling are needed to implement the .NET Standard contract on .NET Framework - they forward to .NET Framework implementations.
In the upcoming .NET 4.7.2, the plan is to no longer need any of these DLLs. Until then, they are necessary.