using System;

using System.Collections.Generic;

using System.Linq;

using System.Diagnostics;

using System.Text.RegularExpressions;

​

public class Program {

    class Foo {

        public int i = 5;

        public string s = "f";

    }

    public static void Main() {

        Console.WriteLine("Hello World");

        var prog = new Program();

        prog.Start();

    }

​

    readonly Foo foo = new Foo();

    public void Start() {

        //LinqStuff();

        //StringTest();

    }

    private void fortest() {

    }

    class Thing {

        public int i   {get; set;}

        public String s {get; set;}

    }

    private void LinqStuff() {

        var ints = new List<int>()

        {

            -23, 2, 1, 99, 6, 2

        };

        var one = from i in ints where i == 2 select i;

        Console.WriteLine(one);

        foreach(int i in one)

            Console.WriteLine(i);

        var things = new Thing[] {new Thing(){i = 3, s="one"}, new Thing(){i=4, s="two"}};

        var ts = from t in things where t.i == 4 select new{str = t.s, jint = 99};

        foreach(var t in ts)

            Console.WriteLine("thing: {0}, {1}.", t.str, t.jint);

        int foo = 55;

        Console.WriteLine("foo: {foo}");

    }

    private void StringTest() {

        String field = "A17^A02";

        int index = field.IndexOf('^');

        String word = field.Substring(0, index);

        Console.WriteLine("index = {0} word= {1}", index, word);

        String segment = "MSH|F1|F2|F3|F4|F5";

        char fieldSeperator = '|';

        MatchCollection mc = Regex.Matches(segment, Regex.Escape(fieldSeperator.ToString()));

        Console.WriteLine(segment.Insert(mc[4].Index, "Foobar"));

    }

​

    private void Stuff() {

        var ints = new List<int>()

        {

            -23, 2, 1, 99, 6

        };

​

        foo.i = 32;

​

​

        int i = ints.FirstOrDefault(x => x == Double.NaN);

        Console.WriteLine("i = {0}", i);

        Console.WriteLine("num =  {0}", "7".PadLeft(7, '0'));

        var obs = new[] {new {i = 1, s = "one"}, new {i = 2, s = "two"}, new {i = 3, s = "three"}};

        foreach(var o in obs) {

            Console.WriteLine("str: {0}", o.s);

        }

        var obs2 = obs.Select(o => o.s);

        foreach(var s in obs2)

            Console.WriteLine("s: {0}", s);

        Debug.WriteLine("debug");

        Conditional();  

    }

    [Conditional("RELEASE")]

    public void Conditional() {

        Console.WriteLine("conditional");   

    }

}