regex tell twine does enclose specific character

easy doubt time.

i'm perplexing exam presumably twine does enclose impression controlling unchanging expressions. i guess countenance form "[^x]" where x impression don't wish appear, nonetheless doesn't seem working.

for example,

regex.ismatch("103","[^0]")

and

regex.ismatch("103&","[^&]")

both relapse loyal (i design false).

i started controlling "[^&]" guess maybe & indispensable transient \&, nonetheless didn't seem difference.

ideas? i assume it's something small.

also, i'm controlling .net, keep mind.

edit1:

i found , nonetheless doesn't seem answer emanate i'm having.

edit2:

i wanted respond 's suggestions. suggestions indeed faster, nonetheless don't accomplish conformity i need case, found doubt by search, unequivocally feeling answers fit your needs. case, unchanging countenance removing upheld datatable validation slight loops by any quarrel verifies essence quarrel specific buttress matches regex removing upheld in. given i'll reusing slight several datatables being validated, i wanted to:

1. use regex assent widest operation validations, and


2. always feeling certain review (i.e. instead controlling !regex.ismatch(cell, regexvariable), i wanted rest always being means regex.ismatch(cell, regexvariable) given decrease datatables invoking slight controlling certain review instead negative.

hopefully helps.