using System;

public class Program

{

    public static void Main()

    {

        var numbers = new[,]

{

    {4, 1, 0, 1, 1, 2},

    {0, 0, 1, 0, 9, 4},

    {4, 0, 5, 0, 1, 0},

    {0, 0, 0, 0, 4, 0},

    {1, 0, 1, 0, 9, 6},

};

​

var targetNumber = 1;

var targetCountPerRow = 0;

var rowIndex = 0;

​

for (var i = 0; i < numbers.GetLength(0); i++)

{

    var count = 0;

    for (var j = 0; j < numbers.GetLength(numbers.Rank - 1); j++)

    {

        {if (numbers[i, j] == targetNumber)

            count += 1;

        }

    }

​

    if (count < targetCountPerRow)

    {

        continue;

    }

    targetCountPerRow = count;

    rowIndex = i;

}

​

Console.WriteLine("The index of row with maximum numbers of 1 is: {0 }", rowIndex);

​

    }

}