Is there a way to set a namespace prefix using XmlSerializer

[T]

I want to use the XmlSerializer to let .NET do the serialization for
me to produce the following XML:

<ws:Security xmlns:ws="http://schemas.xmlsoap .org/ws/2002/07/secext">
<ws:UsernameTok en>
<ws:Username>te st_case_user6</wsse:Username>
<ws:Password>pa ssword</wsse:Password>
</ws:UsernameToke n>
</ws:Security>

Is there any way, maybe through class and member attributes or
properties in the XmlSerializer, to be able to tell the XmlSerializer
to include the "ws:" prefix when it serializes the following classes?

/// <remarks/>
[System.Xml.Seri alization.XmlTy peAttribute(Nam espace="http://schemas.xmlsoap .org/ws/2002/07/secext")]
[System.Xml.Seri alization.XmlRo otAttribute("Se curity",
Namespace="http ://schemas.xmlsoap .org/ws/2002/07/secext",
IsNullable=fals e)]
public class Security {

/// <remarks/>
[System.Xml.Seri alization.XmlEl ementAttribute( "UsernameToken" )]
public SecurityUsernam eToken[] Items;
}

/// <remarks/>
[System.Xml.Seri alization.XmlTy peAttribute(Nam espace="http://schemas.xmlsoap .org/ws/2002/07/secext")]
public class SecurityUsernam eToken {

/// <remarks/>
public string Username;

/// <remarks/>
public string Password;
}