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XmlSerializer xSerializer = new XmlSerializer(typeof(MyObj));
StringWriter sWriter = new StringWriter(CultureInfo.InvariantCulture);
XmlTextWriter xTextWriter = new XmlTextWriter(sWriter);
XmlDocument xmlDoc = new XmlDocument();
xSerializer.Serialize(xTextWriter, myObj);
xmlDoc.LoadXml(sWriter.ToString()); 
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using System;
using System.Xml;
using System.Xml.Serialization;
using System.IO;
/* The XmlRootAttribute allows you to set an alternate name
(PurchaseOrder) of the XML element, the element namespace; by
default, the XmlSerializer uses the class name. The attribute
also allows you to set the XML namespace for the element. Lastly,
the attribute sets the IsNullable property, which specifies whether
the xsi:null attribute appears if the class instance is set to
a null reference. */
[XmlRootAttribute("PurchaseOrder", Namespace="http://www.cpandl.com",
IsNullable = false)]
public class PurchaseOrder
{
public Address ShipTo;
public string OrderDate;
/* The XmlArrayAttribute changes the XML element name
from the default of "OrderedItems" to "Items". */
[XmlArrayAttribute("Items")]
public OrderedItem[] OrderedItems;
public decimal SubTotal;
public decimal ShipCost;
public decimal TotalCost;
}
public class Address
{
/* The XmlAttribute instructs the XmlSerializer to serialize the Name
field as an XML attribute instead of an XML element (the default
behavior). */
[XmlAttribute]
public string Name;
public string Line1;
/* Setting the IsNull


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DECLARE @x xml
SET @x = '<ROOT><a>111</a></ROOT>'
SELECT @x.query('/ROOT/a')
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