小编use*_*310的帖子

public class Client
{
    public Int32 ClientID { get; set; }

    public virtual ICollection<Inquiry> InquiryManufacturers { get; set; }
    public virtual ICollection<Product> Products { get; set; }
    public virtual ICollection<Inquiry> InquiryRetailers { get; set; }
}

public class Product
{
    public Int32 ProductID { get; set; }

    public Int32 ClientID { get; set; }
    public virtual Client Client { get; set; }

    public virtual ICollection<Inquiry> Inquiries { get; set; }
}

public class Inquiry
{
    public Int32 InquiryID { get; …