And Now for XAML Completely Different

//
// MarkupScript                                                  
// Author: Tom Englert
// Contact: mail@tom-englert.de
// Copyright (C) 2010 tom-englert.de
//

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

namespace MarkupScript
{
    /// <summary>
    /// The Read expression. 
    /// Read all content from a file.
    /// Read a line from the console if FileName is empty.
    /// </summary>
    public class Read : Statement, IExpression
    {
        /// <summary>
        /// Optional name of the file to read from. Read from console if file name is empty.
        /// </summary>
        public IExpression FileName { get; set; }

        public override object OnEvaluate()
        {
            string fileName = ToString(TryEvaluate(FileName));

            if (string.IsNullOrEmpty(fileName))
            {
                return Console.ReadLine();
            }
            else
            {
                try
                {
                    return File.ReadAllText(fileName);
                }
                catch (IOException)
                {
                    return string.Empty;
                }
            }
        }
    }
}