ObjectFactory class

[RelationalExplicitMapping("CurrentCompany", typeof(Company), "CurrentCompanyID")]
[RelationalExplicitMapping("PreviousCompany", typeof(Company), "PreviousCompanyID")]
public class Contact
{
    public int ContactID;

    [RelationalMemberInfo(Length = 50)]
    public string FirstName;

    [RelationalMemberInfo(Length = 50)]
    public string LastName;

    [RelationalMemberInfo(IsIntZeroConvertedToNull = true)]
    public int CurrentCompanyID;

    [RelationalMemberInfo(IsIntZeroConvertedToNull = true)]
    public int PreviousCompanyID;
}

public class Company
{
    public int CompanyID;

    [RelationalMemberInfo(Length = 50)]
    public string CompanyName;
}

public class ContactManager : ReFlex.Data.ManagerBase<Contact>
{
    /// <summary>
    /// Gets a list of Contact object that have a FirstName like John, and
    /// a company name that equals the companyName input
    /// </summary>
    /// <param name="companyName"></param>
    /// <returns></returns>
    public List<Contact> GetJohns(string companyName)
    {
        if (string.IsNullOrEmpty(companyName))
            throw new ArgumentNullException("companyName");

        // specify a relationship that will be included in the Criterion
        // with strong parent (inner join) relationship type
        Relationship currentCompanyRelationship = new Relationship(typeof(Company), typeof(Contact), "CurrentCompany", RelationshipTypeEnum.StrongParent);
       
        // create query checking Contact's with FirstName like John
        // and CurrentCompany.CompanyName equals companyName
        Criterion<Contact> criterion = new Criterion<Contact>(CriteriaOperatorEnum.And)
            .Add("FirstName", "John", ComparisonOperatorEnum.Like, CriteriaOperatorEnum.And)
            .Add(new Field<Company>("CompanyName", "CurrentCompany"), companyName, ComparisonOperatorEnum.Equals, CriteriaOperatorEnum.And);

        // specify how the results should be ordered using the Ordering object
        Ordering ordering = new Ordering()
            .Add<Contact>("LastName", Direction.Ascending)
            .Add<Contact>("FirstName", Direction.Ascending);

        // instantiate ObjectFactory and run the query, catching the
        // resulting list of matching Contact objects
        List<Contact> contacts;
        using (ObjectFactory<Contact> mapper = new ObjectFactory<Contact>())
            contacts = mapper.GetDataObjects(criterion, ordering, currentCompanyRelationship);

        return contacts;
    }
}