Getting parent class' name using Reflection

I would like to add some more details, in case you need to find the ultimate parent class of your class, this code could help. I consider that I don't know whether the type is a class or an interface.

do
{
    if (type.IsInterface)
        if (type.BaseType == null)
            break;

    if (type.IsClass)
        if (type.BaseType == typeof(object))
            break;

    type = type.BaseType;

} while (true);

string ultimateBaseTypeName = type.Name;