How to include double quotation mark (") in regular expression

Question

Does anyone know how to include a double quote in a regex. I wrote this regex but could not include the double quote

<asp:RegularExpressionValidator ID="KeywordsRegex" runat="server" ValidationExpression="^[+\-\!\(\)\:\^\[\]\{\}\~\*\?\&&\||].*$" ControlToValidate="Keywords" ErrorMessage="Search keyword is not valid." Text="*"></asp:RegularExpressionValidator> 

Answer 1

Try putting a backslash ( \ ) and then " . This will be the correct XML.

Answer 2

Have you tried to avoid double backslash quotes?

Answer 3

you may need to double the escape, for example \\\"

Answer 4

Try to avoid this: Replace each "with"