I am using clickonce for a windows forms application. I have to deploy some resource assemblies. These assemblies are in a folder in my project (not as a reference). They are marked BuildAction = content and CopyToOutputDir = Copy If Newer. With this configuration I'm getting the warning MSB3178: Assembly '' is incorrectly specified as a file.
When I set the BuildAction to none, the warnings disappear, but the assemblies that must deploy not appear in ClickOnce Application Files.
I would like to add these assemblies (there are many) in the publication of clickonce without this warning and without adding these dlls as references in the project. I researched a lot and could not find a solution to disable the warning.
Edit:
The warning appears only when I set "Enable Clickonce Security Settings" = "True" in "Project / Properties / Security Tab"
SAMPLE PROJECT:
Click to download the sample project
Just build and check the Warnings.
Suppressing MSBuild warnings is still not possible.
Warnings with MSB prefix are thrown by MSBuild. Currently, we can't suppress MSBuild warnings.
There are a few you can suppress in the PropertyGroup of your .csproj file, for example:
<ResolveAssemblyWarnOrErrorOnTargetArchitectureMismatch>None</ResolveAssemblyWarnOrErrorOnTargetArchitectureMismatch>
However none exist for the incorrectly specified as a file warning.
Since you cant fix the root cause of the MSB3178 due to the file extension of a 3rd party DLL, you have justification to ignore that particular warning.
Related SO threads here and here and on MSDN. The exact same question on MSDN.
来源：https://stackoverflow.com/questions/38993872/supress-disable-solve-visual-studio-build-warning