matrix.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Matrix
{
    class Matrix : IMatrix
    {
       private List<List<string>> _matrix = new List<List<string>>();

       private int _columns;
        private int _rows;
        public void Read(Stream stream)
        {
            stream.Seek(0, SeekOrigin.Begin);
            var streamReader = new StreamReader(stream);
            var matrix = streamReader.ReadToEnd();

            var parts = matrix.Split('\n');
            var rows = parts.Length;
            var columns = -1;

            foreach (var part in parts)
            {
                var p = part.Split(' ');
                columns = p.Length;

                var list = new List<string>();

                foreach (var s in p)
                {
                    list.Add(s);
                }
                _matrix.Add(list);
                Console.WriteLine(_matrix);
                Console.ReadLine();
            }
        }

        public void Transpose()
        {
            throw new NotImplementedException();
        }

        public void Write(Stream stream)
        {
            var stringBuilder = new StringBuilder();

            for (int j = 0; j < _columns; j++)
            {
                for (int i = 0; i < _rows; i++)
                {
                    stringBuilder.Append(_matrix[i][j]);
                    if (i != _rows)
                    {
                        stringBuilder.Append(" ");
                    }
                }
                stringBuilder.Append('\n');

            }

            var result = stringBuilder.ToString();

            var streamWriter = new StreamWriter(stream);
            streamWriter.Write(result);
            Console.WriteLine(result);
        }
    }
}