In Entity Framework, what is the parent type of all ObjectQuery fields?

I need to

OrderBy( p => new SomeClass {p.firstField, p.secondField} )

where

public class SomeClass<T>
{    T firstField {get;set;}
     T secondField {get;set;}
}

What is the most specific Entity Framework 4 type that T can be?

What code could I use to set firstFi开发者_如何学运维eld's and secondField's value?

(meaning I want firstField to reference p.ID and secondField to reference p.Name).

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The type of the fields are the normal .NET types. This means that when firstField references to ID, this will probably be an int or a Guid and secondField will probably be a string.

If you are creating a generic class to do ordering with, this is not necessary. You can also do this:

OrderBy( p => new { p.ID, p.Name } )

This will automatically create a type for you.