问题
We have a solution file which contains several projects which builds just fine on my computer using both "dotnet" CLI as well as Visual Studio 2017. Literally overnight, the build would fail, and I cannot associate the change that may have attributed to the failure. Both VS2017 and CLI failed with a message like this:
C:\Program Files\dotnet\sdk\1.0.4\NuGet.targets(97,5): error : Failed to retrieve information about 'System.Xml.XmlDocument' from remote source 'D:\mtp\proj.vs\hello_proj\bin\Release\PublishOutput'. [D:\mtp\proj.vs\server-ray\my_solution.sln]
This is is misleading, as the hello_proj where this seems to indicate, is configured for building "Debug" as oppose to the "Release" shown. I have already attempted to clear out all cached packages, copied packages to where the solution resides, and copied the packages to where the error indicates, but I could not get over this error. Nuget is obviously getting some information somewhere to look for the packages in the wrong place, but I don't really know where it gets that info from. I also verified that the "missing" packages exist in the "global-packages" folder (found by running "nuget local all -list").
I appreciate anyone with some insight into why this is happening. Thanks.
回答1:
It looks like that one of your dependencies is pointing to D: which could have been removed by any reason. I suggest you to delete the packages folder, find the dependency that refers to D: and remove and add it again from Nuget. By the end you can let Visual Studio restore all of dependencies.
Wish you luck.
回答2:
Really obscured, but I found something that fixed my problem. I searched for Nuget.Config in the entire C: drive and found one in %appdata%\Nuget\Nuget.config. I removed it and the build went through successfully. The Nuget.config was restored to some default values that fixed the problem. I can't explain it; just glad it worked.
来源：https://stackoverflow.com/questions/45473462/dotnet-core-solution-failed-restore