How to use Pair in C#

This post will discuss how to use Pair in C#.

1. Using C# 7.0 Tuples

A Pair is a container to store the values of two objects. The C# doesn’t provide any built-in implementation of the Pair class, but starting from .NET 4.0, you can use tuples to implement a pair-like structure:

using System;

public class Example

{

public static void Main()

{

Tuple<string, int> pair = new Tuple<string, int>("David", 25);

Console.WriteLine(pair); // (David, 25)

}

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C# 7.0 tuple lets you create instances of tuples, with or without having to explicitly specify the types of its components. For example, the following example assigns a tuple to individually declared and implicitly typed variables.

using System;

public class Example

{

public static void Main()

{

(var Name, var Age) = ("David", 25);

Console.WriteLine($"({Name}, {Age})"); // (David, 25)

}

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You can even assign a named item tuple to a single implicitly typed variable and then access the tuple items using their attribute.

using System;

public class Example

{

public static void Main()

{

var pair = (Name: "David", Age: 25);

Console.WriteLine($"({pair.Name}, {pair.Age})"); // (David, 25)

}

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2. Custom implementation

If you don’t want to use tuples, you can implement our own Pair class in C#. Here’s a simple custom implementation of the Pair class, where its First and Second fields can store any data type.

using System;

public class Pair<T, U>

{

public T First { get; set; }

public U Second { get; set; }

public Pair(T first, U second) {

this.First = first;

this.Second = second;

}

public override string ToString() {

return $"({First}, {Second})";

}

};

public class Example

{

public static void Main()

{

Pair<string, int> pair = new Pair<string, int>("David", 25);

Console.WriteLine(pair); // (David, 25)

}

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That’s all about using Pair in C#.

1. Using C# 7.0 Tuples

2. Custom implementation

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