ds signature

sig.xml

<ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#" xmlns:etsi="http://uri.etsi.org/01903/v1.3.2#" Id="Signature274136">
    <ds:SignedInfo Id="Signature-SignedInfo96849">
        <ds:CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/>
        <ds:SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1"/>
        <ds:Reference Id="SignedPropertiesID199161" Type="http://uri.etsi.org/01903#SignedProperties" URI="#Signature274136-SignedProperties91015">
            <ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
        </ds:Reference>
        <ds:Reference URI="#Certificate181560">
            <ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
            <ds:DigestValue></ds:DigestValue>
        </ds:Reference>
        <ds:Reference Id="Reference-ID-91214" URI="#comprobante">
            <ds:Transforms>
                <ds:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/>
            </ds:Transforms>
            <ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
            <ds:DigestValue></ds:DigestValue>
        </ds:Reference>
    </ds:SignedInfo>
    <ds:SignatureValue Id="SignatureValue1032042">

    </ds:SignatureValue>
    <ds:KeyInfo Id="Certificate181560">
        <ds:X509Data>
            <ds:X509Certificate>
            </ds:X509Certificate>
        </ds:X509Data>
        <ds:KeyValue>
            <ds:RSAKeyValue>
                <ds:Modulus>
                </ds:Modulus>
                <ds:Exponent>AQAB</ds:Exponent>
            </ds:RSAKeyValue>
        </ds:KeyValue>
    </ds:KeyInfo>
    <ds:Object Id="Signature274136-Object595189">
        <etsi:QualifyingProperties Target="#Signature274136">
            <etsi:SignedProperties Id="Signature274136-SignedProperties91015">
                <etsi:SignedSignatureProperties>
                    <etsi:SigningTime>2016-09-07T18:17:37+00:00</etsi:SigningTime>
                    <etsi:SigningCertificate>
                        <etsi:Cert>
                            <etsi:CertDigest>
                                <ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
                                <ds:DigestValue></ds:DigestValue>
                            </etsi:CertDigest>
                            <etsi:IssuerSerial>
                                <ds:X509IssuerName>CN=AC BANCO CENTRAL DEL ECUADOR,L=QUITO,OU=ENTIDAD DE CERTIFICACION DE INFORMACION-ECIBCE,O=BANCO CENTRAL DEL ECUADOR,C=EC</ds:X509IssuerName>
                                <ds:X509SerialNumber></ds:X509SerialNumber>
                            </etsi:IssuerSerial>
                        </etsi:Cert>
                    </etsi:SigningCertificate>
                </etsi:SignedSignatureProperties>
                <etsi:SignedDataObjectProperties>
                    <etsi:DataObjectFormat ObjectReference="#Reference-ID-91214">
                        <etsi:Description>contenido comprobante</etsi:Description>
                        <etsi:MimeType>text/xml</etsi:MimeType>
                    </etsi:DataObjectFormat>
                </etsi:SignedDataObjectProperties>
            </etsi:SignedProperties>
        </etsi:QualifyingProperties>
    </ds:Object>
</ds:Signature>

Hola, talvez alguna referencia para firmar el xml en .net o c#