Castle dynProxy

Question

I have the following interface

public interface ISelectable { bool Selected {get;set;} }

and impl

public class Selectable:Iselectable { bool Selected {get;set;} }

and my impl for SelectableInterceptor

    public void Intercept(IInvocation invocation)
    {
        if (invocation.Method.DeclaringType.Equals(typeof(ISelectable)))
        {
            if (invocation.Method.Name.Equals("get_Selected"))
            {
                invocation.ReturnValue = (bool)invocation.Arguments[0];
            }

            if ("set_Selected".Equals(invocation.Method.Name))
            {

            }
        }
        else
        {
            invocation.Proceed();
        }
    }

how to invoke the set method ? Please help