C#

<FoxMark>
  <NODE ID="14" NAME="Utility" DESC="">
    <NODE ID="16" NAME="Crack" DESC="">
      <BOOKMARK ID="17" />
      <BOOKMARK ID="18" /> 
      <BOOKMARK ID="19" />
      <BOOKMARK ID="20" />
      <BOOKMARK ID="21" />
      <BOOKMARK ID="22" />
    </NODE>
  </NODE>
</FoxMark>

private void Delete(string id)
        {
	    FileName = "file.xml";
            try
            {
                XElement Xelement = XElement.Load(FileName);

                var SelectedNode = from node in Xelement.Descendants("BOOKMARK")
                                   where node.Attribute("ID").Value == id
                                   select node;

                if (SelectedNode.ToList().Count == 0)
                    SelectedNode = from node in Xelement.Descendants("NODE")
                                   where node.Attribute("ID").Value == id
                                   select node;

                MessageBox.Show(SelectedNode.First().Name.ToString());

                XElement Xnode = Xelement.Element(SelectedNode.First().Name);
                Xnode.Remove();
                Xelement.Save(FileName);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

public class Data
{
    //Default constructor
    public Command cmdCommand; //Command type (login, logout, send message, etcetera)
    public string strMessage; //Message text
    public string strName; //Name by which the client logs into the room

    public Data()
    {
        cmdCommand = Command.Null;
        strMessage = null;
        strName = null;
    }

    //Converts the bytes into an object of type Data
    public Data(byte[] data)
    {
        //The first four bytes are for the Command
        cmdCommand = (Command)BitConverter.ToInt32(data, 0);

        //The next four store the length of the name
        int nameLen = BitConverter.ToInt32(data, 4);

        //The next four store the length of the message
        int msgLen = BitConverter.ToInt32(data, 8);

        //This check makes sure that strName has been passed in the array of bytes
        if (nameLen > 0)
            strName = Encoding.UTF8.GetString(data, 12, nameLen);
        else
            strName = null;

        //This checks for a null message field
        if (msgLen > 0)
            strMessage = Encoding.UTF8.GetString(data, 12 + nameLen, msgLen);
        else
            strMessage = null;
    }

    //Converts the Data structure into an array of bytes
    public byte[] ToByte()
    {
        List<byte> result = new List<byte>();

        //First four are for the Command
        result.AddRange(BitConverter.GetBytes((int)cmdCommand));

        //Add the length of the name
        if (strName != null)
            result.AddRange(BitConverter.GetBytes(strName.Length));
        else
            result.AddRange(BitConverter.GetBytes(0));

        //Length of the message
        if (strMessage != null)
            result.AddRange(BitConverter.GetBytes(Encoding.UTF8.GetByteCount(strMessage)));
        else
            result.AddRange(BitConverter.GetBytes(0));

        //Add the name
        if (strName != null)
            result.AddRange(Encoding.UTF8.GetBytes(strName));

        //And, lastly we add the message text to our array of bytes
        if (strMessage != null)
            result.AddRange(Encoding.UTF8.GetBytes(strMessage));

        return result.ToArray();
    }
}</byte></byte>

Index and count must refer to a location within the buffer.
Parameter name: bytes
A first chance exception of type 'System.ArgumentOutOfRangeException' occurred in mscorlib.dll