using System;

using System.Text.RegularExpressions;

using System.IO;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static IEnumerable<string> Lines (string text) { 

        string line;

        using (StringReader reader = new StringReader(text)) {

            while ((line = reader.ReadLine()) != null) {

                yield return line;

            }

        }

    }

    public static KeyValuePair<string,string> SplitToKeyValue(string text) {

        Regex p = new Regex(@"^(\w+)\s+(.*)$");

        Match m = p.Match(text);

        return new KeyValuePair<string,string>(m.Groups[1].Value,m.Groups[2].Value);

    }

    public static void Main() {

        string text = "LOAD =5.01E+10\r\nMPY $1\r\nADD $2";

        LinkedList<KeyValuePair<string,string>> ll = new LinkedList<KeyValuePair<string,string>>(Lines(text).Select(SplitToKeyValue));

        foreach(KeyValuePair<string,string> kvp in ll) {

            Console.WriteLine(kvp);

        }

    }

}