在C#中学习OOP规则的最佳方法或最佳实践 [英] best way or best-practices for learning OOP rules in c#

问题描述

我发现C#非常有趣...但是(或幸运的是！)它具有实现OOP规则的许多功能....它们具有不同的机制，有时会使我感到困惑....

I found C# very interesting...but unfortunately (or fortunately ! ) it has many features to implement OOP rules....they have different machanisms and make me sometimes confused....

c#中的虚拟，新，...修饰符具有不同的规则..那么学习OOP规则并轻松使用它们的最佳方法或最佳实践是什么?

virtual, new,... modifiers in c# have different rules....so what is the best way or best-practices for learning OOP rules and use them easily...?

那么学习OOP规则并轻松使用它们的最佳方法是什么?

so what is the best way or best-practices for learning OOP rules and use them easily...?

推荐答案

最好的学习方法是使事情保持简单，并经常练习(编程). 关于虚拟/新/覆盖，主要有以下三种情况:

The best way to learn is to keep things simple and practice (program) a lot. Regarding virtual/new/override, there are three main cases:

1. 虚拟+覆盖-在基类中使用virtual并在派生类中覆盖，如:

1. Virtual + override - Use virtual in the base class and override in the derived class, as in:

class BaseClass  
{      
     public void virtual Test(){...}  
}  
class DerivedClass: BaseClass  
{  
    public void override Test(){...}  
}

抽象+覆盖-这是先前情况的变体，其中基础成员未定义主体:

Abstract + override - This is a variant of the previous case where the base member does not define a body:

abstract class BaseClass
{
    public void abstract Test(){...}
}
class DerivedClass: BaseClass
{
    public void override Test(){...}
}

无修饰符-当您不打算覆盖方法时，这很有用:

No modifier - This is useful when you don't plan on overriding a method:

class BaseClass
{
    public void Test(){...}
}
class DerivedClass: BaseClass
{
    public void OtherMethod(){...}
}

在这种情况下，如果OtherMethod被命名为Test，则会出现警告.确实，它将与基本方法冲突.您可以通过添加

In the this case, there would be a warning if OtherMethod was named Test. Indeed, it would clash with the base method. You can get rid of the warning by adding a new modifier as in

abstract class BaseClass
{
    public void Test(){...}
}
class DerivedClass: BaseClass
{
    public new void Test(){...}
}

但是，我建议尽可能避免使用new修饰符，因为它有些令人困惑.

However, I would recommend avoiding the new modifier if possible since it is somewhat confusing.

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