public override string ToString()
{
string authHeader = AuthHeaders.AUTH_DIGEST_KEY + " ";
authHeader += (Username != null && Username.Trim().Length != 0) ? AuthHeaders.AUTH_USERNAME_KEY + "=\"" + Username + "\"" : null;
authHeader += (authHeader.IndexOf('=') != -1) ? "," + AuthHeaders.AUTH_REALM_KEY + "=\"" + Realm + "\"" : AuthHeaders.AUTH_REALM_KEY + "=\"" + Realm + "\"";
authHeader += (Nonce != null) ? "," + AuthHeaders.AUTH_NONCE_KEY + "=\"" + Nonce + "\"" : null;
authHeader += (URI != null && URI.Trim().Length != 0) ? "," + AuthHeaders.AUTH_URI_KEY + "=\"" + URI + "\"" : null;
authHeader += (Response != null && Response.Length != 0) ? "," + AuthHeaders.AUTH_RESPONSE_KEY + "=\"" + Response + "\"" : null;
authHeader += (Cnonce != null) ? "," + AuthHeaders.AUTH_CNONCE_KEY + "=\"" + Cnonce + "\"" : null;
authHeader += (NonceCount != 0) ? "," + AuthHeaders.AUTH_NONCECOUNT_KEY + "=" + GetPaddedNonceCount(NonceCount) : null;
authHeader += (Qop != null) ? "," + AuthHeaders.AUTH_QOP_KEY + "=" + Qop : null;
authHeader += (Opaque != null) ? "," + AuthHeaders.AUTH_OPAQUE_KEY + "=\"" + Opaque + "\"" : null;
string algorithmID = (DigestAlgorithm == DigestAlgorithmsEnum.SHA256) ? SHA256_ALGORITHM_ID : DigestAlgorithm.ToString();
authHeader += (Response != null) ? "," + AuthHeaders.AUTH_ALGORITHM_KEY + "=" + algorithmID : null;
return(authHeader);
}