C# String Format

using System;

namespace ConsoleStringFormat

{

    class Program

    {

        static void Main(string[] args)

        {

            string s = String.Format("It is now {0:d} at {0:t}", DateTime.Now);

            Console.WriteLine(s);

            // Output similar to: 'It is now 4/10/2015 at 10:04 AM'

            

            Decimal pricePerOunce = 17.36m;

            String s1 = String.Format("The current price is {0:C2} per ounce.",pricePerOunce);

            Console.WriteLine(s1);

            // Result if current culture is en-US:

            // The current price is $17.36 per ounce.

            /*

            The following example defines a 6 - character field to hold the string "Year" and some year strings, as well as an 15 - character field to hold the string "Population" and some population data. Note that the characters are right-aligned in the field.

            */

            int[] years = { 2013, 2014, 2015 };

            int[] population = { 1025632, 1105967, 1148203 };

            var sb = new System.Text.StringBuilder();

            sb.Append(String.Format("{0,6} {1,15}\n\n", "Year", "Population"));

            for (int index = 0; index < years.Length; index++)

                sb.Append(String.Format("{0,6} {1,15:N0}\n", years[index], population[index]));

                Console.WriteLine(sb);

            Console.ReadKey();

        }

    }

}

OUTPUT

It is now 2021-05-03 at 7:04 PM

The current price is $17.36 per ounce.

  Year      Population

  2013       1,025,632

  2014       1,105,967

  2015       1,148,203