http://www.kunal-chowdhury.com/2016/01/compute-hash-code.html
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//source - http://www.kunal-chowdhury.com/2016/01/compute-hash-code.html
internal static string GetHashCode(string filePath, HashAlgorithm cryptoService)
{
// create or use the instance of the crypto service provider
// this can be either MD5, SHA1, SHA256, SHA384 or SHA512
using (cryptoService)
{
using (var fileStream = new FileStream(filePath,
FileMode.Open,
FileAccess.Read,
FileShare.ReadWrite))
{
var hash = cryptoService.ComputeHash(fileStream);
var hashString = Convert.ToBase64String(hash);
return hashString.TrimEnd('=');
}
}
}
test :
WriteLine("MD5 Hash Code : {0}", GetHashCode(FilePath, new MD5CryptoServiceProvider()));
WriteLine("SHA1 Hash Code : {0}", GetHashCode(FilePath, new SHA1CryptoServiceProvider()));
WriteLine("SHA256 Hash Code: {0}", GetHashCode(FilePath, new SHA256CryptoServiceProvider()));
WriteLine("SHA384 Hash Code: {0}", GetHashCode(FilePath, new SHA384CryptoServiceProvider()));
WriteLine("SHA512 Hash Code: {0}", GetHashCode(FilePath, new SHA512CryptoServiceProvider()));
origin - http://www.pipiscrew.com/?p=3451 net-compute-the-hash-value-of-a-file