serialize object to XML String using .NET

[Marlboro]

I have an object to be serialized using \[code\]XMLSerializer.serialize()\[/code\]. I have successfully serialize the objects to XML string then write it to file and the file can be read successfully using \[code\]XmlDocument.load()\[/code\].But now, a value in object's attribute contains \[code\]<\[/code\]. The serialize function serializes the object successfully but \[code\]XMLDocument.load()\[/code\] failed reading the file because the \[code\]<\[/code\] is found with a wrong format. Is there any function to replace any attribute value in object which contains \[code\]<\[/code\] or \[code\]>\[/code\] to \[code\]<\[/code\] or \[code\]>\[/code\] without replacing it one by one? Or there is another way to do this?