C# 6.0 New Feature - String Interpolation | Algorithms, Blockchain and Cloud

C# 6.0 has many handy new features and the string interpolation is one of my favorites. Let’s look at the simple code that uses the string.format function.

using System;
 
namespace ConsoleApplication5
{
    class Program
    {
        static void Main(string[] args)
        {
            int v = 1;
            Console.WriteLine(string.Format("v = {0}", v));
            Console.ReadLine();
        }
    }
}

using System;

namespace ConsoleApplication5
{
    class Program
    {
        static void Main(string[] args)
        {
            int v = 1;
            Console.WriteLine(string.Format("v = {0}", v));
            Console.ReadLine();
        }
    }
}

The Resharper greys out the string.Format and says it is redundant call. It even offers a quick button to make it shorter/concise (the yellow bulb icon)

using System;
 
namespace ConsoleApplication5
{
    class Program
    {
        static void Main(string[] args)
        {
            int v = 1;
            Console.WriteLine($"v = {v}");
            Console.ReadLine();
        }
    }
}

using System;

namespace ConsoleApplication5
{
    class Program
    {
        static void Main(string[] args)
        {
            int v = 1;
            Console.WriteLine($"v = {v}");
            Console.ReadLine();
        }
    }
}

You see, the string interpolation puts a $ (dollar) sign before the string literal (similar to @ for not escaping strings). And the variables are directly put into the curly braces, so you don’t have to count the order of parameters.