我并不想这么说，但这并不重要。

认真对待。

看看那些重要的东西:你的项目，你的代码，你的工作，你的个人生活。它们中的任何一个都不会成功依赖于是否使用“this”关键字来限定对字段的访问。这个关键字不会帮助你按时发货。它不会减少bug，也不会对代码质量或可维护性产生明显的影响。它不会让你加薪，也不会让你在办公室花更少的时间。

It's really just a style issue. If you like "this", then use it. If you don't, then don't. If you need it to get correct semantics then use it. The truth is, every programmer has his own unique programing style. That style reflects that particular programmer's notions of what the "most aesthetically pleasing code" should look like. By definition, any other programmer who reads your code is going to have a different programing style. That means there is always going to be something you did that the other guy doesn't like, or would have done differently. At some point some guy is going to read your code and grumble about something.

I wouldn't fret over it. I would just make sure the code is as aesthetically pleasing as possible according to your own tastes. If you ask 10 programmers how to format code, you are going to get about 15 different opinions. A better thing to focus on is how the code is factored. Are things abstracted right? Did I pick meaningful names for things? Is there a lot of code duplication? Are there ways I can simplify stuff? Getting those things right, I think, will have the greatest positive impact on your project, your code, your job, and your life. Coincidentally, it will probably also cause the other guy to grumble the least. If your code works, is easy to read, and is well factored, the other guy isn't going to be scrutinizing how you initialize fields. He's just going to use your code, marvel at it's greatness, and then move on to something else.

黑C + +铝

它被用在赋值操作符中，大多数时候你必须检查和防止奇怪的(无意的，危险的，或只是浪费程序时间的)事情，比如:

A a;
a = a;

你的赋值操作符将被写成:

A& A::operator=(const A& a) {
    if (this == &a) return *this;

    // we know both sides of the = operator are different, do something...

    return *this;
}

这个关键字在c#中有几种用法。

限定由相似名称隐藏的成员 将对象本身作为参数传递给其他方法 使对象从方法中返回自身 声明索引器 声明扩展方法 在构造函数之间传递参数 在内部重新分配值类型(struct)值。 在当前实例上调用扩展方法 转换为另一种类型 到同一类中定义的链构造函数

可以通过在作用域中不使用相同名称的成员变量和局部变量来避免第一种用法，例如通过遵循通用命名约定并使用属性(Pascal大小写)而不是字段(驼峰大小写)来避免与局部变量冲突(也是驼峰大小写)。在c# 3.0中，可以使用自动实现的属性轻松地将字段转换为属性。

在Jakub Šturc的回答中，他关于在构造器之间传递数据的第5条可能需要一些解释。这是在重载构造函数中，并且是强制使用This的一种情况。在下面的例子中，我们可以使用默认形参从无参数构造函数调用参数化构造函数。

class MyClass {
    private int _x
    public MyClass() : this(5) {}
    public MyClass(int v) { _x = v;}
}

我发现有时候这是一个特别有用的功能。

this关键字的另一个很少使用的情况是，当您需要从实现类中调用显式接口实现时。这里有一个人为的例子:

class Example : ICloneable
{
    private void CallClone()
    {
        object clone = ((ICloneable)this).Clone();
    }

    object ICloneable.Clone()
    {
        throw new NotImplementedException();
    }
}

每当我引用一个实例变量时，我都会使用它，即使我不需要。我认为这让代码更清晰。