如何檢查所有兩個對象的屬性是否相等，包括派生的屬性？

Question

比方說，我有這三類：

class Person 
{ 
    public string FirstName { get; set; } 
    public string LastName { get; set; } 
    public int IdNumber { get; set; } 
    public string Address { get; set; } 

    // Constructor and methods. 
} 

class Employee : Person 
{ 
    public byte SalaryPerHour { get; set; } 
    public byte HoursPerMonth { get; set; } 

    // Constructor and methods. 
} 

class Seller : Employee 
{ 
    public short SalesGoal { get; set; } 
    public bool MetSaleGoleLastYear { get; set; } 

    // Constructor and methods. 
} 

我會實現IEquatable<T>這樣的：

public bool Equals(Person other) 
{ 
    if (other == null) return false; 
    return FirstName == other.FirstName 
     && LastName == other.LastName 
     && IdNumber == other.IdNumber 
     && Address == other.Address; 
} 

public bool Equals(Employee other) 
{ 
    if (other == null) return false; 
    return FirstName == other.FirstName 
     && LastName == other.LastName 
     && IdNumber == other.IdNumber 
     && Address == other.Address 
     && SalaryPerHour == other.SalaryPerHour 
     && HoursPerMonth == other.HoursPerMonth; 
} 

public bool Equals(Seller other) 
{ 
    if (other == null) return false; 
    return FirstName == other.FirstName 
     && LastName == other.LastName 
     && IdNumber == other.IdNumber 
     && Address == other.Address 
     && SalaryPerHour == other.SalaryPerHour 
     && HoursPerMonth == other.HoursPerMonth 
     && SalesGoal == other.SalesGoal 
     && MetSaleGoleLastYear == other.MetSaleGoleLastYear; 
} 

現在，你可以看到，更多的一類是沿着繼承鏈中較爲我需要檢查的屬性。例如，如果我從別人編寫的類繼承，我還需要查看類代碼以查找其所有屬性，以便我可以使用它們來檢查值相等性。這聽起來很奇怪。沒有更好的方法來做到這一點？

Answer 1

使用基地。矮得多。

public bool Equals(Seller other) 
{ 
    if (other == null) return false; 
    return base.Equals(other) 
    && SalesGoal == other.SalaryPerHour; 
    && MetSaleGoleLastYear == other.HoursPerMonth; 
} 

Answer 2

除了吳宇森的回答，以下是更正後完整的解決方案：

public bool Equals(Person other) 
{ 
    if (other == null) return false; 
    return FirstName == other.FirstName 
     && LastName == other.LastName 
     && IdNumber == other.IdNumber 
     && Address == other.Address; 
} 

public bool Equals(Employee other) 
{ 
    if (other == null) return false; 
    return base.Equals(other) 
     && SalaryPerHour == other.SalaryPerHour // ; removed 
     && HoursPerMonth == other.HoursPerMonth; 
} 

public bool Equals(Seller other) 
{ 
    if (other == null) return false; 
    return base.Equals(other) 
     && SalesGoal == other.SalesGoal // SalaryPerHour; 
     && MetSaleGoleLastYear == other.MetSaleGoleLastYear; //HoursPerMonth; 
}