C# | Tuple<T1,T2> Class

Last Updated : 23 Nov, 2021

The Tuple<T1, T2> class is used to create a 2-tuple or pair. It represents a tuple which contains the two elements in it. You can instantiate a Tuple<T1, T2> object by calling either the Tuple<T1, T2>(T1, T2) constructor or by the static Tuple.Create method. You can retrieve the value of the tuple’s elements by using the read-only Item1 and Item2 instance property.
Important Points:

It implements IStructuralComparable, IStructuralEquatable, and IComparable interface.
It defined under System namespace.
It represent multiple data into a single data set.
It allows us to create, manipulate, and access data set.
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

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

Property

Property	Description
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:

CSharp

// C# program to illustrate the constructor 
// and property of Tuple<T1,T2> Class
using System;
 
class GFG {
 
    // Main Method
    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);
    }
}

Output:

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

Methods

Method	Description
Equals(Object)	Returns a value that indicates whether the current Tuple<T1, T2> object is equal to a specified object.
GetHashCode()	Returns the hash code for the current Tuple<T1, T2> object.
GetType()	Gets the Type of the current instance.
MemberwiseClone()	Creates a shallow copy of the current Object.
ToString()	Returns a string that represents the value of this Tuple<T1, T2> instance.

Example:

CSharp

// C# program to determine whether 
// the given tuples are equal or not
using System;
 
public class GFG {
 
    // Main method
    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..");
        }
    }
}