DynamicXml

/*
var xml = @"<root><books>
<book is_read=""false""><author>Test</author></book>
<book is_read=""true""><author>Test2</author></book>
</books></root>";

dynamic book = new DynamicXml(xml);

Console.WriteLine(book.Book[1]);
*/
public class DynamicXml : DynamicObject, IEnumerable
{
static readonly DynamicXml Null = new DynamicXml();

#region Friendly Xml

static readonly Regex TagRegex = new Regex(@"<(/?)(.*?)>");
static readonly Regex AttrRegex = new Regex(@"(\w+)=""");

static string Friendly(string txt)
{
var dictionary = new Dictionary<string, string>();
Func<string, string> formatTag = tag =>
{
if (!dictionary.ContainsKey(tag))
dictionary.Add(tag, FormatText(tag));
return dictionary[tag];
};

var result = TagRegex.Replace(txt, delegate(Match match)
{
var original = match.Result("$2");
string worked;

#region tag work

if (original.Contains(" "))
{
var index = original.IndexOf(" ", StringComparison.Ordinal);
worked = formatTag(original.Substring(0, index)) +
AttrRegex.Replace(original.Substring(index),
attr => formatTag(attr.Result("$1")) + "=\"");
}
else
{
worked = formatTag(original);
}

#endregion

return match.Result("<$1") + worked + ">";

});

return result;
}

static string FormatText(string txt)
{
var sb = new StringBuilder();
var up = true;

foreach (var c in txt)
{
if (c == '_')
{
up = true;
}
else
{
if (up)
{
sb.Append(c.ToString(CultureInfo.InvariantCulture).ToUpper());
up = false;
}
else
{
sb.Append(c.ToString(CultureInfo.InvariantCulture).ToLower());
}
}
}

return sb.ToString();
}

#endregion

private readonly List<XElement> _elements = new List<XElement>();

DynamicXml() { }

public DynamicXml(string text, bool friendly = true)
{
try
{
var doc = XDocument.Parse(text);

if (friendly)
{
var formatted = doc.ToString();
doc = XDocument.Parse(Friendly(formatted));
}

_elements = new List<XElement> { doc.Root };
}
catch (Exception ex)
{
Console.Write(ex);
throw;
}
}

protected DynamicXml(XElement element)
{
_elements = new List<XElement> { element };
}

protected DynamicXml(IEnumerable<XElement> elements)
{
_elements = new List<XElement>(elements);
}

public override bool TryGetMember(GetMemberBinder binder, out object result)
{
result = Null;

switch (binder.Name)
{
case "Count":
result = _elements.Count;
break;
default:
{
var items = _elements.Descendants(XName.Get(binder.Name)).ToList();

if (!items.Any())
{
if (_elements.Count == 1)
{
var attr = _elements[0].Attribute(XName.Get(binder.Name));

if (null != attr)
{
result = attr.Value;
}
}
}
else
{
result = new DynamicXml(items);
}
}
break;
}

return true;
}

public override bool TryGetIndex(GetIndexBinder binder, object[] indexes, out object result)
{
var index = (int)indexes[0];

result = new DynamicXml(_elements[index]);

return true;
}

public IEnumerator GetEnumerator()
{
return _elements.Select(element => new DynamicXml(element)).GetEnumerator();
}

public override string ToString()
{
if (_elements.Count == 1 && !_elements[0].HasElements)
{
return _elements[0].Value;
}

return string.Join("\n", _elements);
}

public static implicit operator string(DynamicXml dyn)
{
return Null == dyn ? null : dyn.ToString();
}

public static implicit operator DynamicXml(string xml)
{
return new DynamicXml(xml);
}
}