What is the usage of tuple in C#?

2 years ago
Noah Thompson
1 minute

In C#, a tuple is a data structure that allows you to combine a set of values of different types together. Tuples are immutable, meaning they cannot be changed once created.

The main purpose of tuples is to return multiple values in a method without needing to create a new class or structure. It offers a convenient way to handle multiple related values.

Here is an example using tuples:

// 创建一个元组
var person = ("John", 25, true);

// 访问元组的值
Console.WriteLine(person.Item1); // 输出 "John"
Console.WriteLine(person.Item2); // 输出 25
Console.WriteLine(person.Item3); // 输出 true

// 创建具有命名元素的元组
var personWithNames = (Name: "John", Age: 25, IsMarried: true);

// 访问具有命名元素的元组的值
Console.WriteLine(personWithNames.Name); // 输出 "John"
Console.WriteLine(personWithNames.Age); // 输出 25
Console.WriteLine(personWithNames.IsMarried); // 输出 true

// 使用元组作为方法的返回值
(string, int) GetPerson()
{
    return ("John", 25);
}

// 调用返回元组的方法
var personInfo = GetPerson();
Console.WriteLine(personInfo.Item1); // 输出 "John"
Console.WriteLine(personInfo.Item2); // 输出 25

Tuples also support deconstruction, which allows you to assign the values of a tuple to multiple variables.

// 解构元组的值
var (name, age) = GetPerson();
Console.WriteLine(name); // 输出 "John"
Console.WriteLine(age); // 输出 25

In summary, tuples are a convenient data structure that can be used to bundle and return multiple values without having to create new classes or structures. They offer a concise syntax for handling multiple related values and can be easily deconstructed.

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