Visual Studio Build Error“csc.exe”退出，代码为-532462766

Getting a csc.exe error with the .NET samples from the site. Running in a Windows 10 x64 environment; projects came in as Win 8 and were required to be retargeted to 8.1. Now the projects don't build. Turned on diagnostics logging to get the detail. Is there a way to get the full command line that is being invoked on build?Getting a csc.exe error with the .NET samples f