Question

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How to compare 2 files fast using .NET?

How can I compare 2 sys files with same named in Dllcache and system32/drivers folders in order to sys file in system32/drivers is corrupted or not?with c#(md5 checksum or crc32 or …)

Answer 1

You could compare their SHA1 hashes:

public string ComputeHash(string filename)
{
    using(var sha1 = new SHA1CryptoServiceProvider())
    {
        byte[] fileData = File.ReadAllBytes(filename);
        string hash = BitConverter.ToString(sha1.ComputeHash(fileData));

    }
}