installing nuget package “same key has already been added.”

Question

i am trying to install Microsoft.Bcl.Build 1.0.14

nuget returns

Installing \'Microsoft.Bcl.Build 1.0.14\'. Successfully installed \'Microsoft.Bcl.Bu         


        

Answer 1

In my case I ran a dotnet restore from the package manager console to get the duplicated key

PM> dotnet restore
  Determining projects to restore...
C:\Program Files\dotnet\sdk\3.1.300\NuGet.targets(128,5): error : An item with the same key has already been added. Key: (XXXX.XXX.XX, 1.0.0.0-preview1) [C:\code\MySolution.sln]