How to convert dataset to xml string with embedded schema

I have been trying to find a way to get an xml string with embedded schema from a dataset.

I know that you can use the .getxml and .getschema functions on the dataset but I do not see an easy way of combining those two results into one valid xml string.

I can't save anything to disk, everything has to happen in memory. I thought of using the .writexml method but you cannot use .writexml and pass a string...

Thank you for any thoughts you might have to solve this problem I am having.

Robertmaybe u can use the XmlSerializer object?