Make public members private
Create a DGML file using a tool for reading the source code, for example
DeepEnds ReadDotNet extract=callgraph output=C:\project\callgraph.dgml C:\project\source.sln
Given that the source is backed up run the tool to change the source code, for example,
DeepEnds ReportPrivatise makePrivate=C:\project C:\project\callgraph.dgml
Attempt the normal build process.
Revert those changes which are causing the build to fail due to the detection of false positives. Note that the interface exported by your binaries may have changed causing third-party applications to fail to build.