Description
Is your feature request related to a problem? Please describe.
When a WinFoms project is using <PublishAot>true</PublishAot> but not <_SuppressWinFormsTrimError>true</_SuppressWinFormsTrimError> there will be an error:
Microsoft.NET.Sdk\targets\Microsoft.NET.RuntimeIdentifierInference.targets(255,5): Error NETSDK1175: Windows Forms is not supported or recommended with trimming enabled.
This error is misleading.
Describe the solution you'd like
As long as _SuppressWinFormsTrimError is added, the error is gone, so this is not an error in my point of view, it's more like an warning.
So it's better to rename _SuppressWinFormsTrimError to _SuppressWinFormsTrimWarning.
When <PublishAot> is used but _SuppressWinFormsTrimWarning is not used, the AOT will run (this is a change), but with warning messages:
Windows Forms is not recommended with trimming enabled.
Just say "not recommended" instead of "not supported or recommended".
When _SuppressWinFormsTrimWarning is used, it works as what it is now.
Additional context
Most people don't know _SuppressWinFormsTrimError, it's not documented. Showing an error too early will prevent users from investigating into the other AOT options.