Are DLL files safe?

Related questions

1. How does DLL injection work?
2. Where do I put msvcp140 DLL?
3. Which block is defined as the entry point of a program?
4. Can we extract code from DLL?
5. What is .NET CTS?
6. Why are DLL files missing?
7. What language is DLL written in?
8. How does .NET GAC work?
9. What is msvcp140 dll not found?
10. Are DLL files binary?

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