Writing XML with the XmlWriter

Solution 1:
If you want to Write a XML string using XmlWriter, you can use below code.
Add below namespace references to the project.
using System.Xml;
using System.IO;
using System.Text;

The XmlWriter and XmlTextWriter classes are defined in the System.XML namespace.

StringBuilder strbuilder = new StringBuilder();
using (XmlTextWriter xmltxtwriter = new XmlTextWriter(stringWriter))
{
                xmltxtwriter.Formatting = Formatting.Indented;
                // Add elements to the string
                xmltxtwriter.WriteStartElement("Employee");
                xmltxtwriter.WriteAttributeString("Contract Year", "2010");
                xmltxtwriter.WriteStartElement("Name");
                xmltxtwriter.WriteString("Employee Name");
                xmltxtwriter.WriteEndElement();
                xmltxtwriter.WriteStartElement("UserName");
                xmltxtwriter.WriteString("User Name");
                xmltxtwriter.WriteEndElement();
                xmltxtwriter.WriteStartElement("StartDate");
                xmltxtwriter.WriteString("Start Date of Contract");
                xmltxtwriter.WriteEndElement();
                xmltxtwriter.WriteStartElement("EndDate");
                xmltxtwriter.WriteString("End Date of Contract");
                xmltxtwriter.WriteEndElement();

                xmltxtwriter.Close();
}
Console.WriteLine(strbuilder.ToString());
Console.Read();

Solution 2:
If you want to Write to XML File using XmlWriter, you can use below code.

Add below namespace reference to the project.
using System.Xml;

The XmlWriter and XmlTextWriter classes are defined in the System.XML namespace.

// Creates an XML file, if it doesn’t exist
using (XmlTextWriter writer= new XmlTextWriter("C:\\Test.xml",null ))
{
                // Starts a new document
                writer.WriteStartDocument();
                // Add elements to the file
                writer.WriteStartElement("Employee");
                writer.WriteAttributeString("Contract Year", "2010");
                writer.WriteStartElement("Name");
                writer.WriteString("Employee Name");
                writer.WriteEndElement();
                writer.WriteStartElement("UserName");
                writer.WriteString("User Name");
                writer.WriteEndElement();
                writer.WriteStartElement("StartDate");
                writer.WriteString("Start Date of Contract");
                writer.WriteEndElement();
                writer.WriteStartElement("EndDate");
                writer.WriteString("End Date of Contract");
                writer.WriteEndElement();
                // Ends the document
                writer.WriteEndDocument();
                writer.Close();
}