how i linq contains(string[]) instead contains(string)

i got large question.

i got linq query put simply looks this:

from xx table
where xx.uid.tostring().contains(string[])
select xx

the values string[] array numbers (1,45,20,10,etc...)

the default .contains .contains(string).

i need instead: .contains(string[])...

edit : user suggested minute an progression category string[]. i learn how, nonetheless any pacific indicate me right direction?

edit : uid also number. that's since converted string.

help anyone?

code1