淡泊以明志,宁静以致远

摘要： public class Customer { public virtual int CustomerId { get; set; } public virtual string Firstname { get; set; } public virtual string Lastname { get; set; } //一对多关系：Customer有一个或多个Orders public virtual IList<Order> Orders { get; set; } }public class Order { public virtual int OrderId { get; s 阅读全文