ZeroMatrix, C# - rextester

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        static int[,] mnArray1 =
            { { 1, 2, 3, 4 },
            { 5, 6, 0, 4 },
            { 0, 4, 9, 4 } };

static int[,] mnArray2 =
            {   { 1, 2, 3, 4, 5, 6, 7},
                { 5, 6, 0, 4, 4, 5, 6 },
                { 0, 4, 9, 4, 5, 6, 9},
                { 8, 4, 9, 4, 5, 6, 9},
                { 8, 4, 9, 4, 5, 6, 9}};

static int[,] mnArray3 =
            { { 1, 2 },
              { 0, 6 }};

public static void Main(string[] args)
        {
            Console.WriteLine("Initial Array:\n");
            Print2DArray<int>(mnArray1);
            ZeroMatrix(mnArray1);
            Console.WriteLine("Zeroed Array:\n");
            Print2DArray<int>(mnArray1);

Console.WriteLine("Initial Array:\n");
            Print2DArray<int>(mnArray2);
            ZeroMatrix(mnArray2);
            Console.WriteLine("Zeroed Array:\n");
            Print2DArray<int>(mnArray2);

Console.WriteLine("Initial Array:\n");
            Print2DArray<int>(mnArray3);
            ZeroMatrix(mnArray3);
            Console.WriteLine("Zeroed Array:\n");
            Print2DArray<int>(mnArray3);
        }

static void ZeroMatrix(int[,] mnArray)
        {
            int mSize = mnArray.GetLength(0);
            int nSize = mnArray.GetLength(1);
            //Console.WriteLine($"mSize {mSize}, nSize {nSize}");
            bool[] mArray = new bool[mSize];    // default false / no need to initialize
            bool[] nArray = new bool[nSize];    // default false / no need to initialize

PopulatemArrayAndnArray(mnArray, mSize, nSize, mArray, nArray);

ZeroMatrix(mnArray, mSize, nSize, mArray, true);
            ZeroMatrix(mnArray, nSize, mSize, nArray, false);
        }

private static void ZeroMatrix(int[,] mnArray, int boolArraySize1, int boolArraySize2, bool[] boolArray, bool rowTraverse)
        {
            for (int i = 0; i < boolArraySize1; i++)
            {
                for (int j = 0; j < boolArraySize2; j++)
                {
                    if (boolArray[i])
                    {
                        if (rowTraverse)
                            mnArray[i, j] = 0;
                        else
                            mnArray[j, i] = 0;
                    }
                    else
                    {
                        j = boolArraySize2; // early exit inner loop
                    }
                }
            }
        }

private static void PopulatemArrayAndnArray(int[,] mnArray, int mSize, int nSize, bool[] mArray, bool[] nArray)
        {
            for (int i = 0; i < mSize; i++)
            {
                for (int j = 0; j < nSize; j++)
                {
                    mArray[i] = mArray[i] == true ||
                        mnArray[i, j] == 0 ?
                        true :
                        false;
                    nArray[j] = nArray[j] == true ||
                        mnArray[i, j] == 0 ?
                        true :
                        false;
                }
            }
        }

public static void Print2DArray<T>(T[,] matrix)
        {
            for (int i = 0; i < matrix.GetLength(0); i++)
            {
                for (int j = 0; j < matrix.GetLength(1); j++)
                {
                    Console.Write(matrix[i, j] + "\t");
                }
                Console.WriteLine();
            }
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,14 sec, absolute running time: 0,09 sec, cpu time: 0,09 sec, average memory usage: 14 Mb, average nr of threads: 3, absolute service time: 0,28 sec