ExceptionXElement.cs

using System;
using System.Collections;
using System.Linq;
using System.Xml.Linq;

/// <summary>Represent an Exception as XML data.</summary>
public class ExceptionXElement : XElement
{
    /// <summary>Create an instance of ExceptionXElement.</summary>
    /// <param name="exception">The Exception to serialize.</param>
    public ExceptionXElement(Exception exception)
        : this(exception, false)
    { }

    /// <summary>Create an instance of ExceptionXElement.</summary>
    /// <param name="exception">The Exception to serialize.</param>
    /// <param name="omitStackTrace">
    /// Whether or not to serialize the Exception.StackTrace member
    /// if it's not null.
    /// </param>
    public ExceptionXElement(Exception exception, bool omitStackTrace)
        : base(new Func<XElement>(() =>
        {
            // Validate arguments
            if (exception == null)
            {
                throw new ArgumentNullException("exception");
            }

            // The root element is the Exception's type
            XElement root = new XElement(exception.GetType().ToString());

            if (exception.Message != null)
            {
                root.Add(new XElement("Message", exception.Message));
            }

            // StackTrace can be null, e.g.:
            // new ExceptionAsXml(new Exception())
            if (!omitStackTrace && exception.StackTrace != null)
            {
                root.Add
                (
                    new XElement("StackTrace",
                        from frame in exception.StackTrace.Split('\n')
                        let prettierFrame = frame.Substring(6).Trim()
                        select new XElement("Frame", prettierFrame))
                );
            }

            // Data is never null; it's empty if there is no data

            if (exception.Data.Count > 0)
            {
                root.Add
                (
                    new XElement("Data",
                        from entry in exception.Data.Cast<DictionaryEntry>()
                        let key = entry.Key.ToString()
                        let value = (entry.Value == null) ? "null" : entry.Value.ToString()
                        select new XElement(key, value))
                );
            }

            // Add the InnerException if it exists
            if (exception.InnerException != null)
            {
                root.Add
                (
                    new ExceptionXElement(exception.InnerException, omitStackTrace)
                );
            }

            return root;
        })())
    { }
}