Add obj/bin folder deletion solution to CS0518 compiler error documentation #47627
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The CS0518 compiler error documentation was missing a commonly effective solution that many developers rely on when encountering this error. A user reported that none of the existing documented solutions work for them, but closing Visual Studio and deleting the
objandbinfolders does resolve the issue.This change adds the missing solution to the main list of resolution actions:
objandbinfolders from your project directory, then reopen Visual Studio and rebuild the project.This solution addresses build cache corruption issues that can cause CS0518 errors, which is a common scenario not covered by the existing solutions focused on mscorlib.dll references and compiler options.
The addition follows the Microsoft Writing Style Guide with imperative mood instructions and proper code formatting for folder names.
Fixes #27832.
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