write a code in c to draw a 128x128 pixel image with each pixel value decided by the user and save the data in a png file, also the possibility to load the image and modify specific pixel in c code in csharp

#include <stdio.h>
#include <stdlib.h>
#include <png.h>

#define WIDTH 128
#define HEIGHT 128

int main() {
    int x, y;
    png_byte color_type = PNG_COLOR_TYPE_GRAY;
    png_byte bit_depth = 8;
    png_structp png_ptr;
    png_infop info_ptr;
    png_bytep * row_pointers;

    // Allocate memory for image data
    uint8_t imageData[WIDTH][HEIGHT];

    // Get user-defined pixel values
    for (y = 0; y < HEIGHT; y++) {
        for (x = 0; x < WIDTH; x++) {
            printf("Enter pixel value for x=%d, y=%d: ", x, y);
            scanf("%hhu", &imageData[x][y]);
        }
    }

    // Open file for writing
    FILE *fp = fopen("image.png", "wb");
    if (!fp) {
        printf("[write_png_file] File could not be opened for writing\n");
        return -1;
    }

    // Initialize PNG structures
    png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
    if (!png_ptr) {
        printf("[write_png_file] png_create_write_struct failed\n");
        return -1;
    }

    info_ptr = png_create_info_struct(png_ptr);
    if (!info_ptr) {
        printf("[write_png_file] png_create_info_struct failed\n");
        return -1;
    }

    if (setjmp(png_jmpbuf(png_ptr))) {
        printf("[write_png_file] Error during init_io\n");
        return -1;
    }

    // Set image attributes
    png_set_IHDR(png_ptr, info_ptr, WIDTH, HEIGHT,
                 bit_depth, color_type, PNG_INTERLACE_NONE,
                 PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);

    // Allocate rows
    row_pointers = (png_bytep*) malloc(sizeof(png_bytep) * HEIGHT);
    for (y = 0; y < HEIGHT; y++) {
        row_pointers[y] = (png_byte*) malloc(png_get_rowbytes(png_ptr,info_ptr));
        for (x = 0; x < WIDTH; x++) {
            // Copy pixel values to row
            row_pointers[y][x] = imageData[x][y];
        }
    }

    // Write PNG data
    png_init_io(png_ptr, fp);
    png_set_rows(png_ptr, info_ptr, row_pointers);
    png_write_png(png_ptr, info_ptr, PNG_TRANSFORM_IDENTITY, NULL);

    // Cleanup and close file
    for (y = 0; y < HEIGHT; y++) {
        free(row_pointers[y]);
    }
    free(row_pointers);
    png_destroy_write_struct(&png_ptr, &info_ptr);
    fclose(fp);

    printf("Image saved as image.png\n");
}
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main.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Drawing;
using System.Drawing.Imaging;

namespace PixelManipulationExample
{
    class Program
    {
        static void Main(string[] args)
        {
            // Load image
            Bitmap image = new Bitmap("image.png");

            // Modify specific pixels
            Console.WriteLine("Enter pixel coordinates to modify (comma-separated, q to quit):");
            while (true)
            {
                string input = Console.ReadLine();
                if (input == "q") break;
                string[] values = input.Split(',');
                int x = int.Parse(values[0]);
                int y = int.Parse(values[1]);
                Console.WriteLine("Current pixel value: " + image.GetPixel(x, y).R);
                Console.Write("Enter new pixel value: ");
                int newValue = int.Parse(Console.ReadLine());
                image.SetPixel(x, y, Color.FromArgb(newValue, newValue, newValue));
            }

            // Save modified image
            image.Save("modified_image.png", ImageFormat.Png);
            Console.WriteLine("Modified image saved as modified_image.png");
        }
    }
}
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