FTP component written with fully managed code

using System;
using System.Collections;
using System.Runtime.InteropServices;

namespace KCommon.Net.FTP
{
	#region COM Interface IFtpAsyncResult
	public interface IFtpAsyncResult
	{
		bool				IsSuccess		{get;}
		bool				IsAborted		{get;}
		bool				IsFailed		{get;}
		string				Message			{get;}
		int					FtpResponseCode	{get;}
	}
	#endregion

	[ClassInterface(ClassInterfaceType.None)]
	public class FtpAsyncResult : IFtpAsyncResult
	{
		public const int Complete	= 0;
		public const int Fail		= 1;
		public const int Abort		= 2;
		private readonly BitArray	m_result;
		private string				m_message;
		private int					m_ftpResponse;
		
		#region Constructors
		internal FtpAsyncResult() : this("Success.", (int)FtpResponse.InvalidCode, Complete)
		{
		}
		internal FtpAsyncResult(string message, int result) : this(message, (int)FtpResponse.InvalidCode, result)
		{
		}
		/*public FtpAsyncResult(string message) : this(message, null, (int)FtpResponse.InvalidCode, Fail)
		{
		}
		public FtpAsyncResult(string message, string fileName) : this(message, fileName, (int)FtpResponse.InvalidCode, Fail)
		{
		}
		public FtpAsyncResult(string message, int ftpCode) : this(message, null, ftpCode, Fail)
		{
		}
		public FtpAsyncResult(string message, string fileName, int ftpCode) : this(message, fileName, ftpCode, Fail)
		{
		}*/
		internal FtpAsyncResult(string message, int ftpCode, int result)
		{
			m_result		= new BitArray(3);
			m_message		= message;
			m_ftpResponse	= ftpCode;
			m_result[result]= true;
		}
		#endregion

		public bool IsSuccess
		{
			get {return m_result[Complete];}
		}
		public bool IsFailed
		{
			get {return m_result[Fail];}
		}
		public bool IsAborted
		{
			get {return m_result[Abort];}
		}
		public int FtpResponseCode
		{
			get {return m_ftpResponse;}
		}
		public string Message
		{
			get {return m_message;}
		}
	}
}