public class Solution

    {

        public void SetZeroes(int[,] matrix)

        {

            var row = matrix.GetLength();

            var col = matrix.GetLength();

            var listrow = new Dictionary<int, int>();

            var listcol = new Dictionary<int, int>();

            for (int i = ; i < row; i++)

            {

                for (int j = ; j < col; j++)

                {

                    if (matrix[i, j] == )

                    {

                        if (!listrow.ContainsKey(i))

                        {

                            listrow.Add(i, );

                        }

                        if (!listcol.ContainsKey(j))

                        {

                            listcol.Add(j, );

                        }

                    }

                }

            }

            foreach (var l in listrow)

            {

                for (int j = ; j < col; j++)

                {

                    matrix[l.Key, j] = ;

                }

            }

            foreach (var l in listcol)

            {

                for (int i = ; i < row; i++)

                {

                    matrix[i, l.Key] = ;

                }

            }

        }

    }