.NET standard dll is NOT generated all of sudden.

SmilingMoon 976 Reputation points

All of sudden, VS complains "Could not copy the file..."

Severity Code Description Project File Line Suppression State
Error MSB3030 Could not copy the file "obj\x64\Debug\netstandard2.0\Way.Standard.AppGeneral.dll" because it was not found. Way.Standard.AppGeneral C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets 4502

When I compile "Way.Standard.AppGeneral" project after changing source code by adding a blank,
compile succeed, but it doesn't generate ".dll" file.

2>SkyOnTheWay.Standard.AppGeneral -> D:\Projects\Way\BulkPhotoEditor-BR-Free\Way.Standard.AppGeneral\bin\x64\Debug\netstandard2.0\Way.Standard.AppGeneral.dll
2>Done building project "SkyOnTheWay.Standard.AppGeneral.csproj".
========== Rebuild All: 2 succeeded, 0 failed, 0 skipped ==========

However, "Way.Standard.AppGeneral.dll" is NOT generated in the folder "D:\Projects\Way\BulkPhotoEditor-BR-Free\Way.Standard.AppGeneral\bin\x64\Debug\netstandard2.0\".

All worked well until yesterday. Starting today, this started happen. There is no compile or any message with a clue.
Any idea?

.NET Standard
.NET Standard
A formal specification of .NET APIs that are available on multiple .NET implementations.
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  1. Ken Tucker 5,811 Reputation points

    Delete the obj folder and then do a rebuild all