How can I create a more user-friendly string.format syntax?

Question

I need to create a very long string in a program, and have been using String.Format. The problem I am facing is keeping track of all the numbers when you have more than 8-10

Answer 1

As of C#6, this kind of string interpolation is now possible using the new string interpolation syntax:

var formatted = $"You are {age} years old and your last name is {name}";