Design models with two 'one-to-many' relationships in asp.net mvc3 - asp.net-mvc-3

Question

I'm having a problem to design my database in ASP.NET MVC 3 using Entity Frameworks. I've followed some tutorials and tryed to adapt to my need. First time using ASP...
I have three tables: Person, Category and Example.
One Example will be in a Category that belongs to a Person, the other way around: one Person might have several Categories and each of those might have several examples.
I think I should design it with two 'one-to-many' relationships. That is my models:
public class Person
{
public int PersonID {get; set;}
public int Name {get; set;}
public string Text {get; set;}
public virtual ICollection<Category> {get; set;}
}
public class Category
{
public int CategoryID {get; set;}
public int PersonID {get; set;}
public string Name {get; set;}
public virtual ICollection<Examples> Examples {get; set;}
public virtual Person Person {get; set;}
}
public class Examples
{
public int ExamplesID {get; set;}
public int CategoryID {get; set;}
public string Title {get; set;}
public string Body {get; set;}
public virtual Category Category {get; set;}
}
I can create the Category and the Person, no problem, even using the #Html.DropDownList helper, the problem is when I try to create the Example, I wanted to populate the second dropdown with Ajax but couldn't do it and suddenly I realize there might be a flaw in my db design, In my Example model I will store the Category but not the Person, as the latter will be in already bound to the Category model, isn't it?
I'm kinda lost...
If needed I can post the Controller and/or views, but I think the problem lies in the model.

Answer 1

Give this a try:
public class Person
{
public int PersonID {get; set;}
public int Name {get; set;}
public string Text {get; set;}
[ForeignKey("PersonID")]
public virtual ICollection<Category> {get; set;}
}
public class Category
{
public int CategoryID {get; set;}
public int PersonID {get; set;}
public string Name {get; set;}
[ForeignKey("CategoryID")]
public virtual ICollection<Examples> Examples {get; set;}
[ForeignKey("PersonID")]
public virtual Person Person {get; set;}
}
public class Examples
{
public int ExamplesID {get; set;}
public int CategoryID {get; set;}
public string Title {get; set;}
public string Body {get; set;}
public virtual Category Category {get; set;}
}