本文主要介绍当创建测试项目或将应用程序和测试升级到ASP.NET Core 2.1/.NET Core 2.1，运行测试失败，程序集加载异常。
System.IO.FileNotFoundException : Could not load file or assembly 'Microsoft.AspNetCore, Version=2.1.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'. The system cannot find the file specified.
![Golang如何写能进入文档的测试先看看效果吧可测试的Example结语[图]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)