vs dll参考错误 - 实例对象是不变的
如果您尝试将NetStandard Library DLL添加到.NET Core Application Visual Studio将引发错误：
实例对象作为不可变的
，并拒绝添加参考。
If you try to add a NetStandard library dll to a .net core application Visual Studio throws the error:
instance object was created as immutable
And refuses to add the reference.
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我以为我会分享这一点，因为搜索并没有太多出现。
您需要在添加.NETSTANDARD库之前添加netStandard.library Nuget软件包的引用。
https://www.nuget.org/packages/netnetantard.library.library dll。
附带说明，我从来没有遇到任何问题，将项目引用添加到NetStandard 2.0项目中，但是我的输出DLL-我做到了。
I thought I would share this as nothing much turns up in a search.
You need to add a reference to the NetStandard.Library NuGet Package, before you can add a .netstandard library.
https://www.nuget.org/packages/NETStandard.Library
Then add references to the DLL.
As a side note, I never had any issues adding a project reference to a netstandard 2.0 project, but to its output dll - I did.
在尝试添加对Twincat.ads库的引用时，我遇到了这个问题。事实证明我的问题与您的相反。我已经使用Nuget添加了包装。 Nuget无法正确安装软件包，但阻止我分别添加对依赖项的引用。在将库添加到参考文献之前，我必须从Nuget中删除包裹。
I had this issue when trying to add a reference to the TwinCat.ADS library. My issue turned out to be the opposite of yours. I had added the package using NuGet. NuGet didn't install the package correctly but was preventing me from adding the reference to the dependencies separately. I had to remove the package from NuGet before I could add the library to the references.