使课程返回字段 [英] Make class return a field

问题描述

有没有一种方法可以让类默认情况下返回其字段之一：

Is there a way to make a class return one of its fields by default like that:

public class TestClass
{
    public string something;
}

TestClass test = new TestClass();
test = "alpha"; // "alpha" string is assigned to "something"
Console.Write(test); // test returns "alpha" string from "something"

如何实现此目的？

推荐答案

对于所有那些说不可能的人，）

public class TestClass
{
    public string something;

    public static implicit operator TestClass(string s) => new TestClass { something = s};

    public static implicit operator string(TestClass testClass) => testClass.something;
}

用法：

TestClass test = new TestClass();
test = "alpha";
Console.WriteLine(test);

礼物：

alpha

注意： Console.WriteLine 将 test 作为 string 并调用 Console。由于隐式转换，WriteLine（字符串值）重载。

Note: Console.WriteLine takes test as string and calls Console.WriteLine(string value) overload thanks to implicit conversion.

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