Connection String Escaping Special Characters

I have several special characters in my connection string password, some of which I am unable to find an escape sequence for. I have found that &amp works for the ampersand (&), but I cannot find escape sequences that work for the

1. dollar sign ($)


2. closing curly brace (})


3. question mark (?)

Does anyone know what these escape sequences are or if there is a list some where that shows the escape sequences for all special characters in an XML connection string?