error CS0433: The type 'System.Threading.ThreadLocal<T>' in packaging branch

[rajsesh]

This seems to be caused by the redgate readyroll extension.

150>------ Rebuild All started: Project: BuildFinalizer, Configuration: Debug ARM ------
150>E:\src\WinObjC\common\winobjc.nuproj.common.targets(180,5): error : The source file for this compilation can be found at: "C:\Users\rajsesh\AppData\Local\Temp\c5f62782-3fb0-435f-b95c-ff56b9528ffb.txt"
150>E:\src\WinObjC\common\winobjc.nuproj.common.targets(180,5): error MSB3758: An error has occurred during compilation. warning CS1685: The predefined type 'System.Threading.Tasks.Task' is defined in multiple assemblies in the global alias; using definition from 'c:\Windows\Microsoft.NET\Framework\v4.0.30319\mscorlib.dll'
150>E:\src\WinObjC\common\winobjc.nuproj.common.targets(180,5): error MSB3758: An error has occurred during compilation. warning CS1685: The predefined type 'System.Threading.Tasks.Task' is defined in multiple assemblies in the global alias; using definition from 'c:\Windows\Microsoft.NET\Framework\v4.0.30319\mscorlib.dll'
150>E:\src\WinObjC\common\winobjc.nuproj.common.targets(180,5): error MSB3758: An error has occurred during compilation. c:\Users\rajsesh\AppData\Local\Temp\lsjlkqsu.0.cs(10,22) : error CS0433: The type 'System.Threading.ThreadLocal<T>' exists in both 'c:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\Common7\IDE\Extensions\5mn5jwtd.qae\System.Threading.dll' and 'c:\Windows\Microsoft.NET\Framework\v4.0.30319\mscorlib.dll'
150>E:\src\WinObjC\common\winobjc.nuproj.common.targets(180,5): error MSB4036: The "LockGitVersion" task was not found. Check the following: 1.) The name of the task in the project file is the same as the name of the task class. 2.) The task class is "public" and implements the Microsoft.Build.Framework.ITask interface. 3.) The task is correctly declared with <UsingTask> in the project file, or in the *.tasks files located in the "C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\MSBuild\15.0\Bin" directory.
150>Done building project "WinObjC.Frameworks.Core.nuproj" -- FAILED.

[rajsesh]

@bbowman removing the "ReadyRoll" extension resolved it.