InputCommand.cs

 using System; 
 using System.IO; 
 using System.Collections; 
 namespace Notepad 
 { 
 
 public class InputCommand 
 { 
 private ArrayList lines; 
 public InputCommand(StringReader reader) { 
 ReadLines(reader); 
 } 
 private void ReadLines(StringReader reader) { 
 lines = new ArrayList(); 
 String line = reader.ReadLine(); 
 while (line != null && line != "*end") { 
 lines.Add(line.TrimEnd()); 
 line = reader.ReadLine(); 
 } 
 } 
 public ArrayList CleanLines() { 
 ArrayList cleanLines = new ArrayList(); 
 foreach ( String line in lines) { 
 cleanLines.Add(CleanTheLine(line)); 
 } 
 return cleanLines; 
 } 
 private String CleanTheLine(String dirty) { 
 return dirty.Replace("", ""); 
 } 
 public int SelectionStart() { 
 int charactersSoFar = 0; 
 foreach (String line in lines) { 
 int index = line.IndexOf(""); 
 if (index != -1) 
 return charactersSoFar + index; 
 else 
 charactersSoFar += line.Length + Environment.NewLine.Length; 
 } 
 return charactersSoFar - Environment.NewLine.Length; 
 } 
 } 
 }