Localization - plural form of noun "Directory has %x file"

[DotNetBoy]

hi,

i would like to know how to localize this sentence:
" directory has %x file"

x is variable and this sentence can be changed by the value of x:

x=1 directory has 1 file
x=25 directory has 25 files

In PHP I can use i.e. ngettext().
But how can I solve this problem in ASP.NET?

ps: use "file(s)" is not good reason:)

[KBJensen]

string.Format("directory has {0} file{1}", x, x == 1 ? "" : "s");