Using String Format to show decimal up to 2 places or simple integer

Question

I have got a price field to display which sometimes can be either 100 or 100.99 or 100.9, What I want is to display the price in 2 decimal places only if the decimals are entered for that price , for instance if its 100 so it should only show 100 not 100.00 and if the price is 100.2 it should display 100.20 similarly for 100.22 should be same . I googled and came across some examples but they didn't match exactly what i wanted :

// just two decimal places
String.Format("{0:0.00}", 123.4567);      // "123.46"
String.Format("{0:0.00}", 123.4);         // "123.40"
String.Format("{0:0.00}", 123.0);         // "123.00"

Answer 1

Sorry for reactivating this question, but I didn't find the right answer here.

In formatting numbers you can use 0 as a mandatory place and # as an optional place.

So:

// just two decimal places
String.Format("{0:0.##}", 123.4567);      // "123.46"
String.Format("{0:0.##}", 123.4);         // "123.4"
String.Format("{0:0.##}", 123.0);         // "123"

You can also combine 0 with #.

String.Format("{0:0.0#}", 123.4567)       // "123.46"
String.Format("{0:0.0#}", 123.4)          // "123.4"
String.Format("{0:0.0#}", 123.0)          // "123.0"

For this formating method is always used CurrentCulture. For some Cultures . will be changed to ,.

Answer to original question:

The simpliest solution comes from @Andrew (here). So I personally would use something like this:

var number = 123.46;
String.Format(number % 1 == 0 ? "{0:0}" : "{0:0.00}", number)