Sequence in Matrix

using System;

namespace SequenceinMatrix.cs
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] rowsCols = Console.ReadLine().Split(" ");
            int height = int.Parse(rowsCols[0]);
            int width = int.Parse(rowsCols[1]);
            string[,] matrix = new string[height, width];
            int bestLenght = 1;
            int result = 1;
            for (int i = 0; i < matrix.GetLength(0); i++)
            {
                string[] numbers = Console.ReadLine().Split(" ");

                for (int j = 0; j < matrix.GetLength(1); j++)
                {

                    matrix[j, i] = numbers[j];
                }

            }
            for (int k = 1; k < matrix.GetLength(0); k++)
            {

                for (int i = 1; i < matrix.GetLength(1); i++)
                {
                    if (matrix[k, i] == matrix[k , i - 1] )
                    {
                        bestLenght++;
                    }
                    else
                    {
                        bestLenght = 1;

                    }
                    if(bestLenght >= result)
                    {
                        result = bestLenght;
                    }
                }
            }
            for (int k = 1; k < matrix.GetLength(0); k++)
            {

                for (int i = 1; i < matrix.GetLength(1); i++)
                {
                    int sum = 1;
                    if (matrix[k, i] == matrix[k - 1, i])
                    {
                        sum++;
                    }
                    else
                    {
                        sum = 1;

                    }
                    if (sum >= result)
                    {
                        result = sum;
                    }
                }
            }
            for (int k = 1; k < matrix.GetLength(0); k++)
            {
                int count = 1;
                for (int i = 1; i < matrix.GetLength(1); i++)
                {
                    if (matrix[k, i] == matrix[k - 1, i - 1])
                    {
                        count++;

                    }
                    else
                    {
                        count = 1;
                    }
                    if (count >= result)
                    {
                        result = count;
                    }
                }
            }
            Console.WriteLine(result);

        }
    }
}