using System.Collections.Generic;
public static void Main()
Console.WriteLine(a.ToString(("#,0.00")));
Console.WriteLine(Math.Round(a, 2));
Console.WriteLine(Math.Round(a, 2, MidpointRounding.AwayFromZero));
Console.WriteLine(b.ToString(("P")));
Console.WriteLine(c.ToString(("d5")));
Console.WriteLine(d.TrimStart('0'));
string.Join(",",e.Split(',').Select(x=>string.Format("'{0}'",x)))