$(MSBuildAllProjects);$(MSBuildBinPath)\Microsoft.CSharp.targets .cs C#

false <_DisabledWarnings>$(NoWarn) true <_DisabledWarnings Condition="'$(_DisabledWarnings)' != ''">$(_DisabledWarnings); <_DisabledWarnings>$(_DisabledWarnings)1701;1702 _ComputeNonExistentFileProperty