Convert Dataset to XML

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You can use ds.WriteXml, but that will require you to have a Stream to put the output into. If you want the output in a string, try this extension method:

public static class Extensions
{
    public static string ToXml(this DataSet ds)
    {
        using (var memoryStream = new MemoryStream())
        {
            using (TextWriter streamWriter = new StreamWriter(memoryStream))
            {
                var xmlSerializer = new XmlSerializer(typeof(DataSet));
                xmlSerializer.Serialize(streamWriter, ds);
                return Encoding.UTF8.GetString(memoryStream.ToArray());
            }
        }
    }
}

USAGE:

var xmlString = ds.ToXml();
// OR
Response.Write(ds.ToXml());

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