c# - Need help replacing parts of json string with regex -

how can replace following using regex.replace in c# application?

replace of following:

rendition\":{

with:

rendition\":[{

so adding left square bracket.

and also

replace:

\"}}

with:

\"}]}

i using jsonconvert newtonsoft convert xml json. rendition element in xmls may or may not array. trying force converted json array

replace:

(?<=rendition:)\"\{(.*?)\"\}\}

with:

\"[{$1\"}]}

in c#:

string json2 = regex.replace(json, "(?<=rendition\\\\\":)\\{(.*?)\\}\\}", "[{$1}]}");

see live demo of c# code running on ideone.

IO