I cannot install the Xero.NetStandard.OAuth2 Nuget package from either VS2017 or VS2019. The error is:
Could not install package 'Xero.NetStandard.OAuth2 3.16.0'. You are trying to install this package into a project that targets '.NETFramework,Version=v4.6', 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.
While my web app is .NET Framework version 4.6.
The Xero NetStandard SDK targets .NET Standard 2.0 and is only compatible with .NET Framework > 4.6.1.
You can see all the compatible frameworks for .NET Standard 2.0 here:
.NET implementation support
Related
I have found a library that I would like to use in VB.NET with Framework 4.8.
The github says that is is a .NET 4.5 library, but it also says that it is a .NET Standard 2.0 library.
When I when to import it in my VB.NET Framework 4.5 project, it says:
The package "SimpleWifi.netstandard 2.0.0" could not be installed. You are trying to install this package in a project that references ".NETFramework,version=v4.5", but the package does not contain assembly references or content files that are compatible with this framework. Contact the package creator for more information.
What could I try next?
Thank you!
SimpleWifi is said to be used with .NET Fragmework 4.6 or later.
If you want to install in SimpleWifi .net 4.5, change your project to .net 4.8, install SimpleWifi, and then change 4.5 again. However, other errors may occur.
I am getting the following warning in my .NET Core 2.2 application:
Warning NU1701 Package 'Microsoft.AspNet.WebApi.Core 5.2.7' was restored using
'.NETFramework,Version=v4.6.1' instead of the project target framework
'.NETCoreApp,Version=v2.2'.
This package may not be fully compatible with your project.
Are there any alternatives for this package?
As said in comments, this is not needed for a ASP.NET Core project. Remove it via NuGet and you should be good to go.
I have the latest version of visual studio, the sdk and runtimes for x64 and x86 version 2.2.1, but my asp.net mvc .net core applications will only recognize being 2.2.0. I can install 2.2.1 into .net core libraries.
What do I need to change to allow my web projects to be 2.2.1 instead of 2.2.0?
(It can't be done through nuget, it provides the statement: Implicitly refrenced by an SDK. To update the package, update the SDK to which it belongs
Since the project is referencing a library with 2.2.1, I see the error: Error NU1605 Detected package downgrade: Microsoft.AspNetCore.App from 2.2.1 to 2.2.0. Reference the package directly from the project to select a different version.)
According to Microsoft documentation packages Microsoft.AspNetCore.App and Microsoft.NETCore.App have special versioning semantics which is handled outside of NuGet.
Also note that specifying a version number on Microsoft.AspNetCore.App package does not guarantee that desired version will be chosen. In general, you should not explicitly specify Microsoft.AspNetCore.App version unless you have a good reason to do so (applies to .NET Core 2.1 and later).
You can read more about that here: Microsoft.AspNetCore.App metapackage
If you want to target specific SDK used in your project or solution, add global.json file to project folder (if you want to target only that specific project) or solution folder if you want to target all projects in the solution.
global.json example:
{
"sdk": {
"version": "2.2.103"
}
}
I have a .NET project whose target framework is 4.5.1. This project depends on a NuGet library which only has a .NET 4.0 release and this library in turn depends on MVVMLight:
MyProject (4.5.1) --> Depends on MyLibrary (4.0) --> Depends on MVVMLight (4.0)
The MVVMLight NuGet also has a 4.5 version so when it's installed on MyProject it ends up referencing the 4.5 version (as opposed to MyLibrary which was compiled with MVVMLight for .NET 4.0).
This results in the following compilation error:
5>...\Adorners\CircleAdorner.cs(19,18,19,31): error CS0012: The type 'GalaSoft.MvvmLight.ObservableObject' is defined in an assembly that is not referenced. You must add a reference to assembly 'GalaSoft.MvvmLight, Version=4.4.32.18939, Culture=neutral, PublicKeyToken=null'.
The error is from a class CircleAdorner which inherits from a class defined in MyLibrary which in turn inherits from ObservableObject from MVVMLight.
Is this situation "legal"? Is it OK to reference a .NET 4.0 library from a .NET 4.5.1 project? From my understanding it should be OK. However, the catch here is that the .NET 4.0 project expects another dependency which is not satisfied here.
Also, I noticed that the DLL version of GalaSoft.MvvmLight for the .NET 4.5 is 4.4.32.39728 and not 4.4.32.18939. In the project I marked this reference with <SpecificVersion>False</SpecificVersion> but it didn't help.
Yes it is legal for a .NET 4.5.1 project to use a .NET 4.0 assembly. .NET 4.5 is an in place update to .NET 4.0 and is backward compatible.
From NuGet's point of view if the version of project's target framework is less than or equal to the assembly version in the NuGet package then they are considered compatible. So NuGet will allow you to add a NuGet package that targets .NET 4.0 into a project that targets .NET 4.5. What you cannot do is add a NuGet package that only targets .NET 4.5 into a project that targets .NET 4.0 since the assemblies in the NuGet package may use parts of the .NET framework that is not included with .NET 4.0.
When installing a package NuGet will pick the highest version of the .NET framework that the NuGet package contains that is compatible with your project.
With your GalaSoft.MvvmLight version mismatch you should be able to resolve the problem using one of two options:
Update MyLibrary to use the same version of MvvmLight that your project is using.
Add a binding redirect to your project's app.config for GalaSoft.MvvmLight so MyLibrary's reference to it is mapped to the later version. If you are using Visual Studio 2013 and writing a .NET 4.5.1 desktop application you can enable automatic binding redirects instead of updating your app.config.
I have a solution with a core library that is portable, targeted at Windows Store, .NET 4.5 and Windows Phone 8.0
This project will not build via TeamCity.
[12:31:36][GetReferenceAssemblyPaths] C:\Windows\Microsoft.NET\Framework\v4.0.30319\Microsoft.Common.targets(983, 5): warning MSB3644: The reference assemblies for framework ".NETPortable,Version=v4.5,Profile=Profile78" were not found. To resolve this, install the SDK or Targeting Pack for this framework version or retarget your application to a version of the framework for which you have the SDK or Targeting Pack installed. Note that assemblies will be resolved from the Global Assembly Cache (GAC) and will be used in place of reference assemblies. Therefore your assembly may not be correctly targeted for the framework you intend.
Is this a known problem or do I have to install something?
Install the Windows Phone SDK. Although the portable library offer's a bunch of platforms to be commonly compatible with, it still needs the relevant SDKs installed.