I have updated Accord.Math library from nuget from version 3.3.0 to version 3.4.0 and my project stopped compiling. It seems like "binary packages\Accord.3.4.0\lib\net46\Accord.dll" is actually built against .NET 4.6.1 not 4.6.

Severity Code Description Project File Line Suppression State
Warning The primary reference "Accord.Math, Version=3.4.0.0, Culture=neutral, PublicKeyToken=fa1a88e29555ccf7, processorArchitecture=MSIL" could not be resolved because it has an indirect dependency on the assembly "Accord, Version=3.4.0.0, Culture=neutral, PublicKeyToken=fa1a88e29555ccf7" which was built against the ".NETFramework,Version=v4.6.1" framework. This is a higher version than the currently targeted framework ".NETFramework,Version=v4.6". C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets 1820