using System;

public class Program

{

    public static void Main()

    {

        // Some local variables we will plug into our larger string

        int age = 4;

        string name = "Soren";

        // Using curly bracket syntx.

        string greeting = string.Format("Hello {0} you are {1} years old", name, age);

        // Using string interpolation.

        string greeting2 = $"Hello {name.ToUpper()} you are {age} years old.";

        Console.WriteLine(greeting);

        Console.WriteLine(greeting2);

    }

}