PM>Install-Package NUnit -Version 3.12.0 PM>Install-Package NUnit3TestAdapter -Version 3.15.1
In FriendlyBaseTest's reference If use Codeer.Friendly.Windows.Grasp.2.0, Other's project's framework is setted to .net 2.0
If use Codeer.Friendly.Windows.Grasp.3.5, Other's project's framework is setted to .net 3.5