C# Tuple<T1,T2> Class

The Tuple<T1, T2> is used to create a 2-tuple or pair. It represents a tuple which contains the two elements in it. We can instantiate a Tuple<T1, T2> object by calling either the Tuple<T1, T2>(T1, T2) constructor or the static Tuple.Create method. We can retrieve the value of the tuple’s elements by using the read-only Item1 and Item2 instance properties. There are some important points which are mentioned below:

• It implements the IStructuralComparable, IStructuralEquatable, and IComparable interface.
• It is defined under the System namespace.
• It represents multiple data into a single data set.
• It allows us to create, manipulate, and access data sets.
• It returns multiple values from a method without using out parameter.
• It allows passing multiple values to a method with the help of single parameters.
• It can also store duplicate elements.

Constructor

// Initializes a new instance of the Tuple<T1, T2> class.
Tuple<T1, T2>(T1, T2)	

Properties

• Item1 : Gets the value of the Tuple<T1, T2> object’s first component.
• Item2 : Gets the value of the current Tuple<T1, T2> object’s second component.

Example 1: Creating a tuple to create new tuple.

// Using constructor and property
// of Tuple<T1,T2> Class
using System;

class Geeks 
{  
	static public void Main()
	{
		// Creating 2-Tuple
		// Using Tuple<T1, T2>(T1, T2) constructor
		Tuple<int, int> mytuple = new Tuple<int, int>(79, 80);

		// Accessing the values
		Console.WriteLine("Value of the First Component: " + mytuple.Item1);
		Console.WriteLine("Value of the Second Component: " + mytuple.Item2);
	}
}

Value of the First Component: 79
Value of the Second Component: 80

Tuple Methods

Example 2: Demonstration of Equals() Method.

// Using the tuple Equals() method
using System;

public class Geeks
{
	static public void Main()
	{
		// Creating 2-Tuple
		// Using Tuple<T1, T2>(T1, T2) constructor
		Tuple<int, int> mytuple1 = new Tuple<int, int>(20, 40);
		Tuple<int, int> mytuple2 = new Tuple<int, int>(20, 49);

		// Using Equals method
		if (mytuple1.Equals(mytuple2))
			Console.WriteLine("Tuple Matched..");
		else
			Console.WriteLine("Tuple not matched..");
	}
}

Tuple not matched..