Tuples With New Features In C# 7.0

Recently, Microsoft announced various new features in C# 7.0 with Visual Studio 2017. In C# 7.0, some new feature of tuples are enhanced with Visual Studio 2017. Tuples aren’t new in C# or.NET. They were first introduced as a part of.NET Framework 4.0. This useful feature of the tuple is all about returning multiple value without having:

1.  A class and list<> of the class. 
   
2. Array, observableCollection, ArrayList or Dictionary.
   
3. A series of ref or out parameters.  
   

It is similar to the code snippet given below.

public (string name, string dept, int id) GetData()
       {
           return ("Avnish", "R&D", 001);
       }

Before C# 7.0, the use of tuple is given below.

public Tuple<string, string, int> GetData2()
      {
          return new Tuple<string, string, int>("Rakesh", "Marketing", 002);
      }

This first thing to be noted is that it is not included automatically in a new project. You must include the System.ValueTuple Nuget package to take an advantage of it in your Visual studio 2017 or its community edition.

 

Let's create a console project for demo.

 

Step 1

Create a new 'Console App' in Visual Studio 2017 RC or Visual Studio 2017.



Step 2

Go to add a NuGet package. By right click to "References" in Solution Explorer, click on "Manage NuGet Package". Now, search for "System.ValueTuple" and install such package.



Step 3

For use of tuples, add the code given below in Program.cs.

  

namespace TupleDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            Demo demo = new Demo();
            var result = demo.GetData();
            Console.WriteLine("Name= " + result.name + " Dept = " + result.dept + " Id= " + result.id);
            var result2 = demo.GetData2();
            Console.WriteLine("Name= " + result2.Item1 + " Dept = " + result2.Item2 + " Id= " + result2.Item3);
            var result3 = demo.GetData3();
            Console.WriteLine("Name= " + result3.Item1 + " Dept = " + result3.Item2 + " Id= " + result3.Item3);
            Console.ReadKey();
        }
    }
    class Demo
    {
        public (string name, string dept, int id) GetData()
        {
            return ("Avnish", "R&D", 001);
        }
        public Tuple<string, string, int> GetData2()
        {
            return new Tuple<string, string, int>("Rakesh", "Marketing", 002);
        }
        public (string, string, int) GetData3()
        {
            return ("Mukesh", "Testing", 003);
        }
    }

}

Step 4

Build and run the project.

 

Thanks for reading.