C# / .NET - string interpolation

C# 6 introduced string interpolation. The main idea is similar to String.Format notation - it is just simplification and the difference is to put before string literal dolar $ sign and put each variable to curly brackets { } signs. Inside curly bracket used are same rules like in String.Format case but variable names are used instead of variable indexes put as parameters. This approach is more clear for programmers. 

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string name = "John";

int age = 45;

string bar = "---John---";

​

string text = $"My name is {name}. I am {age} y.o.\n\n{bar,29}";

​

Console.WriteLine(text);

Output:

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My name is John. I am 45 y.o.

​

                   ---John---

Note: the text variable could be written as string text = String.Format("My name is {0}. I am {1} y.o.\n{2,20}", name, age, bar); according to previous approach. 

1. String interpolation - Microsoft Docs