Hello:

// C#Example01.cs
using System;
using System.Xml;   //my marker: error cs0234 ÐÐ
using System.Text;
using System.IO;

namespace myApp
{
  class mainClass
  {
    static void Main(string[] args)
    {
      FileStream myFile = new FileStream("test.xml", FileMode.Open);
      XmlTextReader myReader = new XmlTextReader(myFile);
      Console.Write("{0,-20}{1,-20}{2,-20}\n", "Type", "Name", "Value");
      Console.Write("{0,-20}{1,-20}{2,-20}\n", "--------------------",
                    "--------------------", "--------------------");
      while(myReader.Read())
        Console.Write("{0,-20}{1,-20}{2,-20}\n",
                      myReader.NodeType.ToString(),
                      myReader.Name, myReader.Value);
      myReader.Close();
      myFile.Close();
    }
  }
}

//test.xml
<?xml version="1.0"?>
<customer>
&nbsp;&nbsp;&nbsp;<name>Alfred Q. Anybody</name>
&nbsp;&nbsp;&nbsp;<address>123 Anywhere Road</address>
&nbsp;&nbsp;&nbsp;<city>Somewheretown</city>
&nbsp;&nbsp;&nbsp;<state>PA</state>
&nbsp;&nbsp;&nbsp;<postalCode>29374</postalCode>
</customer>

>csc Example01.cs&nbsp;&nbsp;
error cs0234 ...

Example01.cs and test.xml is in the same fold.
why? please.