string GettingHashSHA1(string filePath)
{
Byte[] shaHash;
using(var shaForStream = new System.Security.Cryptography.SHA256Managed())
using(System.IO.Stream sourceFileStream = System.IO.File.Open(filePath, System.IO.FileMode.Open))
using (System.IO.Stream sourceStream = new System.Security.Cryptography.CryptoStream(sourceFileStream, shaForStream, System.Security.Cryptography.CryptoStreamMode.Read))
{
while (sourceStream.ReadByte() != -1);
shaHash = shaForStream.Hash;
}
_hashFile1 = Convert.ToBase64String(shaHash);
return _hashFile1;
}
public override int ReadByte()
{
return(_cryptoStream.ReadByte());
}