Tuples In C# 7 - What Are They And How Can I Use Them?

static (string, string, int) MyData()  
{  
    return ("Omar", "maher", 123456);  
}  

static (string, string, int) MyData()  
{  
    return ("Omar", "maher", 123456);  
}   

static void Main(string[] args)  
{  
    var userData = MyData();  
    Console.WriteLine($"My name is { userData.Item1} " +  
        $"{ userData.Item2} and my password is " +  
        $"{ userData.Item3}");  
          }   

static (string firstName, string lastName, int password) MyData2()  
{  
    return ("Omar", "maher", 123456);  
}   

And now, let’s call it with the the same previous example like this.

static void Main(string[] args)  
{  
    var userData2 = MyData2();  
    Console.WriteLine($"My name is { userData2.Item1} " +  
        $"{ userData2.Item2} and my password is " +  
        $"{ userData2.Item3}");  
 }   

And when it runs, it will give us the same result.

And also, you can use the name of variables like this.

static void Main(string[] args)  
{  
    var userData2 = MyData2();  
    Console.WriteLine($"My name is { userData2.firstName} " +  
        $"{ userData2.lastName} and my password is " +  
        $"{ userData2.password}");  
  
    Console.WriteLine($"My name is { userData2.Item1} " +  
        $"{ userData2.Item2} and my password is " +  
        $"{ userData2.Item3}");  
  }   

As you see in the above example, we used both the ways for the same MyData2() method by .Item1 and by the name of the variable. Let's run it and see the results.

Wow, we got the same results.

Third way to consume tuple is by Deconstructions

That means I will create new variables to assign to its values from the return of the method, like this.

static void Main(string[] args)  
{  
   (var firstName, var lastName, var password) = MyData2();  
  
    Console.WriteLine($"My name is {firstName} " +  
         $"{ lastName} and my password is " +  
         $"{ password}");  
 } 

And, let's run it to see the result.

Or in a short way, by using one var before it.

static void Main(string[] args)  
        {  
            var (firstName, lastName, password) = MyData2();  
  
            Console.WriteLine($"My name is {firstName} " +  
                 $"{ lastName} and my password is " +  
                 $"{ password}");  
          }   

And, the result also will be the same.

static void Main(string[] args)  
        {  
            var (firstName, lastName, password) = MyData2();  
  
            Console.WriteLine($"My name is {firstName} " +  
                 $"{ lastName} and my password is " +  
                 $"{ password}");  
          }   

You can find the source code here - https://github.com/omarmaher100/Tuples

In the end, I hope it will help you.