private void ComputeSignature()
{
PreDigestedSignedInfo signedInfo = new PreDigestedSignedInfo(_dictionaryManager);
signedInfo.AddEnvelopedSignatureTransform = true;
signedInfo.CanonicalizationMethod = XD.ExclusiveC14NDictionary.Namespace.Value;
signedInfo.SignatureMethod = _signingCreds.SignatureAlgorithm;
signedInfo.DigestMethod = _signingCreds.DigestAlgorithm;
signedInfo.AddReference(_referenceId, _hashStream.FlushHashAndGetValue(_preCanonicalTracingStream));
SignedXml signedXml = new SignedXml(signedInfo, _dictionaryManager, _tokenSerializer);
signedXml.ComputeSignature(_signingCreds.SigningKey);
signedXml.Signature.KeyIdentifier = _signingCreds.SigningKeyIdentifier;
signedXml.WriteTo(base.InnerWriter);
((IDisposable)_hashStream).Dispose();
_hashStream = null;
}
