How to convert a String to Stream

How do you convert a String object to Stream (type) object?

I know it is more common to do the conversion in the other direction, but for me it is definitely the other way.

I have a web service input parameter of type string.  This parameter is actually an xml document payload. Why this is so is a long story.

Anyway, I need to validate it.  I've written xml validation code in the past.  The one real stumbling block here isd this data type conversion.

I'm at a bit of a loss how to do this.  Ultimately I need to get the data into an XmlReader object coupled with the XmlReadersettings object (this is a .net 2.0 asp.net app).  Looking at the object model for various System.XML namespace objects this does not appear to be a straightforward task.

Short of writing the string to disk and then opening it up with a FileStream object,there's got to be a better way.  Anyone have a better idea?

Thanks!