DataSet to XMl and XML to Dataset

Question

From database a table contains a column of image datatype .I bind that table with the dataset the dataset fills.

After the dataset fills it contains many of other datatype but in image datatype it conatins System.Byte[] Data.

so from the above.

Suppose a dataset column contains system.Byte[] datas how to write it in XML file.

And how to fetch the data from that same XML file to dataset so that the dataset 

should conatin the same system.Byte[] datas