Get parent property from Expression function

So, let's say that I have the following classes:

public class Model {
    public AnotherModel InnerModel {
        get;
        set;
    }
}

public class AnotherModel {
    public String Value{
        get;
        set;
    }
}

      

        
        
        
      

    

I now have the following function:

public static void Foo<T, U>(Expression<Func<T, U>> func) {
     // Get the property info from func
}

      

        
        
        
      

    

Now I would like to do the following:

Foo<Model, String>(o => o.InnerModel.Value)

      

        
        
        
      

    

Here's the problem:

I know that you can get PropertyInfo from func expression by doing:

PropertyInfo propertyInfo = (PropertyInfo)((MemberExpression)func.Body).Member;

      

        
        
        
      

    

This will give me the PropertyInfo of the Value property. However, I would also like to get information about the parent property, that is, the InnerModel property.

What I know so far is that I can do the following:

((MemberExpression)func.Body).Expression

      

        
        
        
      

    

to get information about the parent property. However, there seems to be no way to extract the PropertyInfo from the expression itself.

Is there any way to get the PropertyInfo expression?

Edit: To clarify, and this might be a bad way to try, but here goes: I can't use EntityFramework to do this, just to make sure it's clear.

There is a database that I need to communicate with via the API.

This database got the usual relationships like: The table thread UserID -> Users.UserID

Now let's select the models. To follow the example above:

class Thread {
    [Reference(USER_USERID)]
    [TableKey(THREAD_USERID)]
    public User user {
        get;set;
    }
}

class User {
     [TableKey(USER_USERID)]
     public int UserId {
         get;set;
     }
}

      

        
        
        
      

    

Now I would like to make requests for this. So I thought, "Hey, let's use expressions to make it easier for the end user to ask for things, yay."

So, we could do something like EqualTo (o => o.user.UserId, 1);

However, since the TableKey property is different from the reference key, I need to first fetch the userId from the Thread table from the database, and then with that Id start querying the User table for information with that ID.

Perhaps this clarifies the purpose of all this, or maybe not.