Msbuild: MSB0001: Internal MSBuild Error: Type information for Microsoft.Build.Utilities.ToolLocationHelper was present in the whitelist cache as Microsoft.Build.Utilities.ToolLocationHelper, Microsoft.Build.Utilities.Core, Version=15.1.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a but the type could not be loaded. unexpectedly null

[rvidis]

I am having issues with the above error message when running build with the latest .nuget packages installed. I am trying to build a project, not solution. When I use Microsoft.Build version 14.3.0 I don't see this problem.

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="Microsoft.Build" version="15.1.548" targetFramework="net461" />
  <package id="Microsoft.Build.Framework" version="15.1.548" targetFramework="net461" />
  <package id="Microsoft.Build.Runtime" version="15.1.548" targetFramework="net461" />
  <package id="Microsoft.Build.Tasks.Core" version="15.1.548" targetFramework="net461" />
  <package id="Microsoft.Build.Utilities.Core" version="15.1.548" targetFramework="net461" />
  <package id="System.Collections" version="4.3.0" targetFramework="net461" />
  <package id="System.Collections.Immutable" version="1.3.1" targetFramework="net461" />
  <package id="System.Diagnostics.Debug" version="4.3.0" targetFramework="net461" />
  <package id="System.Globalization" version="4.3.0" targetFramework="net461" />
  <package id="System.Runtime" version="4.3.0" targetFramework="net461" />
  <package id="System.Runtime.InteropServices" version="4.3.0" targetFramework="net461" />
  <package id="System.Threading" version="4.3.0" targetFramework="net461" />
  <package id="System.Threading.Thread" version="4.3.0" targetFramework="net461" />
</packages>

To get this far I had to add assembly binding:

<dependentAssembly>
        <assemblyIdentity name="Microsoft.Build.Framework" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-99.9.9.9" newVersion="15.1.0.0" />
      </dependentAssembly>

Please help, I will be happy to provide more details.

[jeffkl]

Can you verify that Microsoft.Build.Utilities.Core.dll is in your output folder?

[rvidis]

Thank you for responding. I have changed to use msbuild.exe from command line instead so moved on already.

[DerekSMorin]

I hit the same error after I installed:

Install-Package Microsoft.Build -Version 15.1.1012

But then I installed:

Install-Package Microsoft.Build.Utilities.Core -Version 15.1.1012

And things started working.

A little confusing...

[dasMulli]

Related SO question popped up: https://stackoverflow.com/questions/44249320/build-project-with-microsoft-build-api

[RenniePet]

Possible better solution for current versions of Microsoft.Build components:
https://stackoverflow.com/a/49886334/253938
https://github.com/dotnet/roslyn/issues/26029

[rainersigwald]

Also see https://docs.microsoft.com/en-us/visualstudio/msbuild/updating-an-existing-application.

[fatihbahceci]

Thank you. Worked for me too. But I'm really confused, I'm using .NET Framework 4.7.2 for TargetFramework.