c# - Regex to match exact words in double square brackets -

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i have following regex, matches words inside double bracket squares:

@"(?<=\[\[)[^]]+(?=\])"

problem: want replace in input

[[hello]] -> foo [[helloworld]] -> bar

code following:

message = message.replace(match.value, value.tostring()); message = regex.replace(message, @"[\[\]']+", "");

in output, receive fooworld. how should modify regex foo , bar?

your regex @"(?<=\[\[)[^]]+(?=\])" matches 1+ characters other ] if preceded [[ , followed ]. not match [[x x x]]-like strings. not match [[x y ] bracket ]]-like strings.

you achieve need @"\[\[(.*?)]]" regex (using regexoptions.singleline flag), , replacing $1:

message = regex.replace("[[hello]]", @"\[\[(.*?)]]", "$1"));

see ideone demo

however, given current requirements (or absence) can use

 message = message.replace("[[", "").replace("]]", "");

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