.net - Trouble with regex capturing group & lazy match -

using .net c#, want match names in $select clause in follownig :

http://serveraddress/odataserv/wcfdataservice.svc/persons?$select=last_name_idnt,first_name_idnt&$top=1&$filter=id eq '0000' 

so have "last_name_idnt,first_name_idnt" (i'll split later based on comma)

the $select clause can in middle of url, or @ end, i.e :

http://serveraddress/odataserv/wcfdataservice.svc/persons?$top=1&$filter=id eq '0000'&$select=last_name_idnt,first_name_idnt 

so wrote following pattern : (\$select\=)(.[^&])*(&|$) , tried group 2. don't know if it's because of lazy matching, group 2 contains 2 characters : "nt" in example.

i don't know how make can retrieve "last_name_idnt,first_name_idnt"

thanks in advance

the regex using :

(\$select\=)(.[^&])*?(&|$) 

(.[^&]) - capturing group captures 2 characters together. character , not &.

now (.[^&])*? means 0 or more set of these 2 characters lazy match. capturing group have last 2 characters of match

use instead:

(\$select\=)([^&]*)