Serialize one to many relationships in Json.net

I am using the Entity Framework code first for data access and I have a Company class which has a collection of Employees. The Employee class also has a Company property.

I would like to be able to serialize a Company and include the list of employees in the serialization.

Here is Company:

public class Company
{
public long Id { get; set; }
public string Name { get; set; }
public DateTime? Established { get; set; }

public virtual IList<Employee> Employees { get; set; }

public DateTime? DateCreated { get; set; }
public DateTime? DateUpdated { get; set; }
}

Here is Employee

public class Employee
{
public long Id { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public int Age { get; set; }

public virtual Company Company { get; set; }

public DateTime? DateCreated { get; set; }
public DateTime? DateUpdated { get; set; }
}

I get a serialization Exception "Self referencing loop detected for type" when I try to serialize a Company object.

Thanks.