A tuple is a data structure that holds a set of data. Tuples are mainly helpful when you want to group data and use it. Normally, a C# method can only return one value. By using a tuple, it is possible to return multiple values from a method. The Tuple class is available under the System.Tuple namespace. A tuple can be created using the Tuple<> constructor or by an abstract method named Create that comes with the Tuple class.

You can fix any data type in a tuple and access it using Item1, Item2, and so on. Let's look at an example to get a better idea of this:

var person = new Tuple<string, int, string>("Martin Dew", 42, "Software Developer"); // name, age, occupation
or 
var person = new Tuple.Create("Martin Dew", 42, "Software Developer");

Let's take a look at how to return a tuple from a method by using the following code:

public static Tuple<string, int, string> GetPerson() {
    var person = new Tuple<string, int, string>("Martin Dew", 42, "Software Developer");
    return person;
}
static void Main() {
    var developer = GetPerson();
    Console.WriteLine("The person is {0}. He is {1} years old. He is a {2}", developer.Item1, developer.Item2, developer.Item3 );
}