Add Prefix:"ds" - SignedXml

Is there a way to set the prefix on the Signature of a Signed XML Document (SignedXml class in .Net)?

So instead of:

<Signaturexmlns="http://www.w3.org/2000/09/xmldsig#>
...
</Signature>

I could have the following:

<ds:Signaturexmlns:ds="http://www.w3.org/2000/09/xmldsig#>
...
</ds:Signature>



Thanks