public void Sign(string contentFilename, string thumbprint, string signatureFilename, bool useLocalSystemStorage = false)
{
var signatureContent = crypt.Sign(File.ReadAllBytes(contentFilename),
crypt.GetCertificateWithPrivateKey(thumbprint, useLocalSystemStorage).RawData);
File.Delete(signatureFilename);
File.WriteAllBytes(signatureFilename, signatureContent);
}
