原NUnit測試用例在升級為.NET Core之前是可以正常運行的，

升級後，在VS.NET下可以正常運行，但到了TeamCity下報異常：

[08:46:58][Step 5/5] NUnit.Engine.NUnitEngineException : An exception occurred in the driver while loading tests.

[08:46:58][Step 5/5]  ----> System.IO.FileNotFoundException : 未能加载文件或程序集“nunit.framework”或它的某一个依赖项。系统找不到指定的文件。

[08:46:58][Step 5/5] --NUnitEngineException

[08:46:58][Step 5/5]

[08:46:58][Step 5/5] Server stack trace:

[08:46:58][Step 5/5]    在 NUnit.Engine.Runners.DirectTestRunner.LoadDriver(IFrameworkDriver driver, String testFile, TestPackage subPackage)

[08:46:58][Step 5/5]    在 NUnit.Engine.Runners.DirectTestRunner.LoadPackage()

[08:46:58][Step 5/5]    在 NUnit.Engine.Runners.TestDomainRunner.LoadPackage()

[08:46:58][Step 5/5]    在 NUnit.Engine.Runners.DirectTestRunner.EnsurePackageIsLoaded()

[08:46:58][Step 5/5]    在 NUnit.Engine.Runners.DirectTestRunner.RunTests(ITestEventListener listener, TestFilter filter)

[08:46:58][Step 5/5]    在 NUnit.Engine.Runners.AbstractTestRunner.Run(ITestEventListener listener, TestFilter filter)

[08:46:58][Step 5/5]    在 NUnit.Engine.Agents.RemoteTestAgent.Run(ITestEventListener listener, TestFilter filter)

[08:46:58][Step 5/5]    在 System.Runtime.Remoting.Messaging.StackBuilderSink._PrivateProcessMessage(IntPtr md, Object[] args, Object server, Object[]& outArgs)

[08:46:58][Step 5/5]    在 System.Runtime.Remoting.Messaging.StackBuilderSink.PrivateProcessMessage(RuntimeMethodHandle md, Object[] args, Object server, Object[]& outArgs)

[08:46:58][Step 5/5]    在 System.Runtime.Remoting.Messaging.StackBuilderSink.SyncProcessMessage(IMessage msg)

[08:46:58][Step 5/5]

[08:46:58][Step 5/5] Exception rethrown at [0]:

[08:46:58][Step 5/5]    在 System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)

[08:46:58][Step 5/5]    在 System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)

[08:46:58][Step 5/5]    在 NUnit.Engine.ITestEngineRunner.Run(ITestEventListener listener, TestFilter filter)

[08:46:58][Step 5/5]    在 NUnit.Engine.Runners.ProcessRunner.RunTests(ITestEventListener listener, TestFilter filter)

修改 NUnit Console 版本，繼續異常，但異常不同：

[09:09:51][Step 5/5] An exception occurred in the driver while loading tests.

[09:09:51][Step 5/5]

[09:09:51][Step 5/5] Server stack trace:

[09:09:51][Step 5/5]    在 NUnit.Engine.Runners.DirectTestRunner.LoadDriver(IFrameworkDriver driver, String testFile, TestPackage subPackage)

[09:09:51][Step 5/5]    在 NUnit.Engine.Runners.DirectTestRunner.LoadPackage()

[09:09:51][Step 5/5]    在 NUnit.Engine.Runners.TestDomainRunner.LoadPackage()

[09:09:51][Step 5/5]    在 NUnit.Engine.Runners.DirectTestRunner.EnsurePackageIsLoaded()

[09:09:51][Step 5/5]    在 NUnit.Engine.Runners.DirectTestRunner.RunTests(ITestEventListener listener, TestFilter filter)

[09:09:51][Step 5/5]    在 NUnit.Engine.Runners.AbstractTestRunner.Run(ITestEventListener listener, TestFilter filter)

[09:09:51][Step 5/5]    在 NUnit.Engine.Agents.RemoteTestAgent.Run(ITestEventListener listener, TestFilter filter)

[09:09:51][Step 5/5]    在 System.Runtime.Remoting.Messaging.StackBuilderSink._PrivateProcessMessage(IntPtr md, Object[] args, Object server, Object[]& outArgs)

[09:09:51][Step 5/5]    在 System.Runtime.Remoting.Messaging.StackBuilderSink.PrivateProcessMessage(RuntimeMethodHandle md, Object[] args, Object server, Object[]& outArgs)

[09:09:51][Step 5/5]    在 System.Runtime.Remoting.Messaging.StackBuilderSink.SyncProcessMessage(IMessage msg)

[09:09:51][Step 5/5]

[09:09:51][Step 5/5] Exception rethrown at [0]:

[09:09:51][Step 5/5]    在 System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)

[09:09:51][Step 5/5]    在 System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)

[09:09:51][Step 5/5]    在 NUnit.Engine.ITestEngineRunner.Run(ITestEventListener listener, TestFilter filter)

[09:09:51][Step 5/5]    在 NUnit.Engine.Runners.ProcessRunner.RunTests(ITestEventListener listener, TestFilter filter)

[09:09:51][Step 5/5]

[09:09:51][Step 5/5] Test Run Summary

[09:09:51][Step 5/5]  Overall result: Failed

[09:09:51][Step 5/5]  Test Count: 0, Passed: 0, Failed: 0, Warnings: 0, Inconclusive: 0, Skipped: 0

[09:09:51][Step 5/5]  Start time: 2018-08-17 01:09:47Z

[09:09:51][Step 5/5]    End time: 2018-08-17 01:09:51Z

[09:09:51][Step 5/5]    Duration: 3.566 seconds

檢查項目中版本：

官網NUnit Console版本：

引用降級為v3.8.0，TeamCity異常：NU1605: Detected package downgrade: NUnit from 3.10.1 to 3.8.0. Reference the package directly from the project to select a different version.