How to get object information

[Acidburn]

Hi guys,

Following on from my questions earlier about plugins I've got another stumbling block to get over.

I've got an object say "Person". This person has 2 fields - age and name. This lives in the UI project.

Now i've got a DLL that implements the following interface:

public interface myStoragePlugin:IPlugins
	{
		void write(object toAdd);
		object getAll();
	}

the DLL that implements this interface takes these methods and writes to XML. Or rather heres the problem. I call this code in the UI after I've loaded the module. On calling write(new Person());

The plugin doesn't know what fields are coming from the type object. And it doesn't appear to want to refect so I can't build a list of field attributes.

In my DLL method I have this...

...
 public void Add(Object toAdd)
        {
            typeof( toAdd );
        }

Why does this generate the following error:

Error 2 The type or namespace name 'toAdd' could not be found (are you missing a using directive or an assembly reference?) C:\Users\John\Desktop\XmlPlugin\Class1.cs 16 21 XmlPlugin