Implementing WSSE using reflections c#

I have an assembly and i have the code as

Object instance = assembly.CreateInstance(
        clientProxyType.Name,
        false,
        BindingFlags.CreateInstance,
        null,
        new object[] { se.Binding, endpoint == null ? se.Address : new EndpointAddress(endpoint.ChildNodes[0].Value) },
        CultureInfo.CurrentCulture, null)

Where this part is working. Now i have an client credentials

var creds =
            new UsernameClientCredentials(new UsernameInfo(
                wsse["Username"] != null ? wsse["Username"].ChildNodes[0].Value : null,
                wsse["Password"] != null ? wsse["Password"].ChildNodes[0].Value : null,
                wsse["Token"] != null ? wsse["Token"].ChildNodes[0].Value : null,
                wsse["PlainToken"] != null ? wsse["PlainToken"].ChildNodes[0].Value : null));

which has wsse part.

I need to add these above mentioned credntials as endpoint behaviors to the instance object.