Extension methods to serialize lists

ListExtensions.cs

using Newtonsoft.Json;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Xml;
using System.Xml.Serialization;

namespace Extensions
{
    public static class ListExtensions
    {
        // https://stackoverflow.com/a/14696980/368318
        public static List<T> NoEmptyList<T>(this List<T> data) where T : new()
        {
            if (data.Count() == 0)
            {
                data = new List<T> { new T { } };
            }

            return data;
        }

        public static XmlDocument ToXML<T>( this List<T> list, string rootElement = "root" )
        {
            XmlDocument xmlDoc = new XmlDocument();

            using ( var memoryStream = new MemoryStream() )
            using ( var writer = new XmlTextWriter( memoryStream, Encoding.Unicode ) )
            {
                XmlSerializer ser = new XmlSerializer( typeof( List<T> ), new XmlRootAttribute( rootElement ) );
                ser.Serialize( writer, list );

                memoryStream.Position = 0; //rewind the stream before reading back
                xmlDoc.Load( memoryStream );
            }

            return xmlDoc;
        }

        public static DataTable ToDataTable<T>( this List<T> list )
        {
            DataTable dataTable = new DataTable( typeof( T ).Name );

            //Get all the properties
            PropertyInfo[] Props = typeof( T ).GetProperties( BindingFlags.Public | BindingFlags.Instance );
            foreach ( PropertyInfo prop in Props )
            {
                //Setting column names as Property names
                dataTable.Columns.Add( prop.Name );
            }
            foreach ( T item in list )
            {
                var values = new object[Props.Length];
                for ( int i = 0; i < Props.Length; i++ )
                {
                    //inserting property values to datatable rows
                    values[i] = Props[i].GetValue( item, null );
                }
                dataTable.Rows.Add( values );
            }
            //put a breakpoint here and check datatable
            return dataTable;
        }

        public static void ToFile<T>(this IList<T> data, string path)
        {
            var dir = Path.GetDirectoryName(path);
            Directory.CreateDirectory(dir);

            var json = JsonConvert.SerializeObject(data, Newtonsoft.Json.Formatting.Indented);
            File.WriteAllText(path, json);
        }
    }
}