private void AddReference(Assembly assembly)
{
Tuple referencesTuple = References as Tuple;
if (referencesTuple == null)
{
throw Ops.TypeError("cannot add reference");
}
// Load the assembly into IronPython
if (state.TopPackage.LoadAssembly(state, assembly))
{
// Add it to the references tuple if we
// loaded a new assembly.
References = referencesTuple.AddSequence(Tuple.MakeTuple(assembly));
}
}