XML Parser Error when using web services

Question

Hi,

I am facing a problem when I am retreiving a data from data field of type 'nvarchar' which has unicode data from sql server 2008 and converting the data to xml format using web service in asp.net 3.5 with c#.

I am getting an error as "XML Parsing Error: reference to invalid character number".

I tried in google but i couldn't solve my problem.

Please, Help me...