My own Mailinator in 5 minutes

using System;
using System.Collections.Generic;
using System.Text;

namespace LumiSoft.Net
{
    /// <summary>
    /// This class provides bit debugging methods.
    /// </summary>
    internal class BitDebuger
    {
        #region static method ToBit

        /// <summary>
        /// Converts byte array to bit(1 byte = 8 bit) representation.
        /// </summary>
        /// <param name="buffer">Data buffer.</param>
        /// <param name="count">Numer of bytes to convert.</param>
        /// <param name="bytesPerLine">Number of bytes per line.</param>
        /// <returns>Returns byte array as bit(1 byte = 8 bit) representation.</returns>
        public static string ToBit(byte[] buffer,int count,int bytesPerLine)
        {
            if(buffer == null){
                throw new ArgumentNullException("buffer");
            }

            StringBuilder retVal = new StringBuilder();

            int offset = 0;
            int bytesInCurrentLine = 1;
            while(offset < count){
                byte   currentByte = buffer[offset];
                char[] bits        = new char[8];
                for(int i=7;i>=0;i--){
                    bits[i] = ((currentByte >> (7 - i)) & 0x1).ToString()[0];
                }
                retVal.Append(bits);

                if(bytesInCurrentLine == bytesPerLine){
                    retVal.AppendLine();
                    bytesInCurrentLine = 0;
                }
                else{
                    retVal.Append(" ");
                }
                bytesInCurrentLine++;
                offset++;
            }

            return retVal.ToString();
        }

        #endregion
    }
}