Regular expression for single quotes and double quotes

Question

single quotes and double quots both are allowed, so i am using regular expression but it is accepted either single quote or double quote but both are not allowed.
i am using following regular expression in asp.net

"^[a-zA-Z0-9-_/.#$%^*()}{:;+=|!,?~@&amp<>' ]*$"

please reply the answer to my question.

Thank you,
G. Nagaraju