CmdID

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System.Collections.dll

System.Collections file version info

Library on Windows 1 known copy with hashes

Is it the real System.Collections.dll?

file version info and known copies
Installed inC:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.8\Facades\
Signed byMicrosoft Corporation
ProductMicrosoft .NET Framework, Microsoft Corporation
DescriptionSystem.Collections

1 known copy

4.8.4084.0 · C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.8\Facades\System.Collections.dll · signed by Microsoft Corporation

32dfff0b4e95c1db71c7f562897e7b3b4ecf7cfc8e58d4d96c7481a570eeae1f

From the file’s version info and the copies recorded by xCyclopedia (MIT). A copy in another folder, signed by someone else or with another hash is not necessarily malicious, but it is worth a closer look. In Ceplin, "<sha256>".whatis() says which known copy a hash is.