add commas using String.Format for number and

Question

Using String.Format how can i ensure all numbers have commas after every 3 digits eg 23000 = \"23,000\" and that 0 returns \"0\".

String.Format(\"{0:n}\", 0); //give

Answer 1

from msdn

double value = 1234567890;
Console.WriteLine(value.ToString("#,#", CultureInfo.InvariantCulture));

Displays 1,234,567,890