String.Format-ting floating point numbers, how?

[iliyang]

I want to format a floating point number with accuracy 2 digits after the point, but if the number is round, to show it more friendly. For example: if the number is 2.3, show 2.3 and not 2.30 if it's 3, show 3 and not 3.00 and if the number is 4.12345, show 4.12 What' the formatting string that I can achieve this with? Thanks in advance ;)

[Seraphin]

float number = 4.12345; string result = String.Format("{0:00}", Math.Round(number,2));

[iliyang]

Ahha! Works, but with formatting string "{0}" is better. Thanks a lot, seems that the Round trick is the keystone here ;)