Formats XML to be prettily indented. Useful for dealing with XML saved from the Internet.

XmlFormatter

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Xml;

// Compile and run via the command line:
// > XmlFormatter.exe < BadXml.xml > GoodXml.xml
// If GoodXml is ignored, it will print to stdout.

namespace XmlFormatter {
    class Program {
        static void Main(string[] args) {
            var tr = Console.In;
            string s = tr.ReadToEnd();
            XmlDocument doc = new XmlDocument();
            try {
                doc.LoadXml(s);
                StringBuilder sb = new StringBuilder();
                using (XmlTextWriter tw = new XmlTextWriter(new StringWriter(sb))) {
                    tw.Formatting = Formatting.Indented;
                    doc.Save(tw);
                }
                Console.Write(sb.ToString());
            } catch (XmlException ex) {
                Console.WriteLine("There was an error reading the XML file. Please make sure it is an actual XML file. " + ex.Message);
            }
        }
    }
}