Whenever we do a query task with column value having a single quote ESRI query task fails. We are using 2.1 version. Please let us know if there is any solution for this.
As the single quote is used as string delimiter, you have to escape it if you want it inside a string. Something like: query.Where = "City = 'Bois D\'Arcy' "; Are you talking about this case or something else?