[c#] Root element is missing

I am reading xml from xxx URl but i am getting error as Root element is missing.

My code to read xml response is as follows:

  XmlDocument doc = new XmlDocument();
  doc.Load("URL from which i am reading xml");
  XmlNodeList nodes = doc.GetElementsByTagName("Product");
  XmlNode node = null;
  foreach (XmlNode n in nodes)
   {
   }

and the xml response is as follows:

<All_Products>
   <Product>
  <ProductCode>GFT</ProductCode>
  <ProductName>Gift Certificate</ProductName>
  <ProductDescriptionShort>Give the perfect gift. </ProductDescriptionShort>
  <ProductDescription>Give the perfect gift.</ProductDescription>
  <ProductNameShort>Gift Certificate</ProductNameShort> 
  <FreeShippingItem>Y</FreeShippingItem>
  <ProductPrice>55.0000</ProductPrice>
  <TaxableProduct>Y</TaxableProduct>
   </Product>    
 </All_Products>

Can you please tell where i am going wrong.

1. Check the trees.config file which located in config folder... sometimes (I don't know why) this file became to be empty like someone delete the content inside... keep backup up of this file in your local pc then when this error appear - replace the server file with your local file. This is what i do when this error happened.

2. check the available space on the server. sometimes this is the problem.

Good luck.

Make sure you XML looks like this:

<?xml version="1.0" encoding="utf-8"?>
<rootElement>
...
</rootElement>

Also, a blank XML file will return the same Root elements is missing exception. Each XML file must have a root element / node which encloses all the other elements.

If you are loading the XML file from a remote location, I would check to see if the file is actually being downloaded correctly using a sniffer like Fiddler.

I wrote a quick console app to run your code and parse the file and it works fine for me.

I had the same problem when i have trying to read xml that was extracted from archive to memory stream.

 MemoryStream SubSetupStream = new MemoryStream();
        using (ZipFile archive = ZipFile.Read(zipPath))
        {
            archive.Password = "SomePass";
            foreach  (ZipEntry file in archive)
            {
                file.Extract(SubSetupStream);
            }
        }

Problem was in these lines:

XmlDocument doc = new XmlDocument();
    doc.Load(SubSetupStream);

And solution is (Thanks to @Phil):

        if (SubSetupStream.Position>0)
        {
            SubSetupStream.Position = 0;
        }

Just in case anybody else lands here from Google, I was bitten by this error message when using XDocument.Load(Stream) method.

XDocument xDoc = XDocument.Load(xmlStream);  

Make sure the stream position is set to 0 (zero) before you try and load the Stream, its an easy mistake I always overlook!

if (xmlStream.Position > 0)
{
    xmlStream.Position = 0;
}
XDocument xDoc = XDocument.Load(xmlStream);