Clearing my phone since it is very messy with a lot of files, and found some notes here:

Handling string in C#
List of Numeric Formats

* C or C – For Currency. Uses the cultures currency symbol.
* D or D – Integer types. Add a number for 0 padding eg D5.
* E or e – Scientific notation.
* F or f – Fixed Point.
* G or g – Compact fixed-point/scientific notation.
* N or n – Number. This can be enhanced by a NumberFormatInfo object.
* P or p – Percentage.
* R or r – Round-trip. Keeps exact digits when converted to string and back.
* X or x – Hexadecimal. x – uses abcdef, X use ABCDEF.

Dates can also be specified either using Standard Format strings

* O or o – YYYY-MM-dd:mm:ss:ffffffffzz
* R or r – RFC1123 eg ddd, dd MMM yyyy HH:ss GMT
* s – sortable . yyyy-MM-ddTHH:mm:ss
* u – Universal Sort Date – yyyy-MM-dd HH:mm:ssZ

or Format specifiers. There are too many of those to list here. Example:

using System;
using System.Text;
using System.Globalization;
namespace ex6
{
	class Program
	{
		static void Main(string[] args)
		{
			// Numeric Formatting Examples
			// integer
			int i = 5678;
			string s = string.Format("{0,10:D}", i); // Into a string right aligned 10 width
			Console.WriteLine("{0,10:D}", i); // or output direct
			Console.WriteLine("{0,10:D7}", i); // or output direct with leading 0
			// double and currency in various formats
			double d=47.5;
			double bigd = 19876543.6754;
			Console.WriteLine("{0,15:C2}", d); // In Uk = ￡47.50 right aligned in 15 width
			Console.WriteLine("{0,15:N10}", bigd); // Number
			Console.WriteLine("{0,15:E3}", d); // Scientific 4.750E+001
			Console.WriteLine("{0,15:F5}", d); // Fixed Point 47.50000
			Console.WriteLine("{0,15:G4}", d); // Compact 47.5
			Console.WriteLine("{0,10:P2}", d/100.0); // %
			Console.WriteLine("{0,15:R}", bigd); // Roundtrip - not a digit lost
			// Hex-a-diddly-decimal
			Console.WriteLine("{0,10:x8}", i); // lowercase 0000162e
			Console.WriteLine("{0,10:X8}", i); // uppercase 0000162E
			// Date formats
			DateTime dt = DateTime.Now;
			// Standards
			Console.WriteLine("{0:O}", dt); // O or o yyyy'-'MM'-'dd'T'HH':'mm':'ss'.'fffffffzz
			Console.WriteLine("{0:R}", dt); // R or r ddd, dd MMM yyyy HH':'mm':'ss 'GMT'
			Console.WriteLine("{0:s}", dt); // s yyyy'-'MM'-'dd'T'HH':'mm':'ss
			Console.WriteLine("{0:u}", dt); // u yyyy'-'MM'-'dd HH':'mm':'ss'Z'
			// Using date/time specifiers
			Console.WriteLine("{0:t}", dt); // short time
			Console.WriteLine("{0:T}", dt); // long time
			Console.WriteLine("{0:d}", dt); // short date
			Console.WriteLine("{0:D}", dt); // long date
			Console.WriteLine("{0:f}", dt); // long date / short time
			Console.WriteLine("{0:F}", dt); // long date / long time
			Console.WriteLine("{0:g}", dt); // short date / short time
			Console.WriteLine("{0:G}", dt); // short date / long time
			Console.WriteLine("{0:o}", dt); // Round Trip
			// roll your own...
			Console.WriteLine("{0:dd/mm/yyyy HH:MM:ss}", dt); // custom - what most people use (UK)!
			Console.WriteLine("{0:mm/dd/yyyy HH:MM:ss}", dt); // custom - what most people use (US)!
			Console.WriteLine("{0:yyyy/mm/dd HH:MM:ss}", dt); // custom - (Japan) Good for sorting!
			Console.WriteLine("{0:dd MMM yyyy HH:MM:ss}", dt); // custom - month (UK)
			Console.WriteLine("{0:MMM dd yyyy HH:MM:ss}", dt); // custom - month (US)
			Console.WriteLine("{0:yyyy MMM dd HH:MM:ss}", dt); // custom - (Japan)
			Console.ReadKey();
		}
	}
}

C:
Standard: \r\n
(don’t use \n\r)