Display Width and Height of a BMP File Using FileStream in C#

using System;
using System.IO;

class BMPInfoExtractor
{
    // Main method to run the program
    static void Main(string[] args)
    {
        // Prompt the user for the file path of the BMP image
        Console.WriteLine("Please enter the file path of the BMP image:");

        // Read the file path from user input
        string filePath = Console.ReadLine();

        try
        {
            // Open the BMP file using FileStream in read mode
            using (FileStream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read))
            {
                // Check if the file is a BMP file by reading the first two bytes (BM)
                byte[] fileType = new byte[2];
                fileStream.Read(fileType, 0, 2);

                // If the file is not a BMP, display an error message
                if (fileType[0] != 'B' || fileType[1] != 'M')
                {
                    Console.WriteLine("The file is not a valid BMP file.");
                    return;
                }

                // Move the file pointer to the width field (bytes 18-21)
                fileStream.Seek(18, SeekOrigin.Begin);

                // Read the width (4 bytes)
                byte[] widthBytes = new byte[4];
                fileStream.Read(widthBytes, 0, 4);

                // Convert the byte array to an integer representing the width
                int width = BitConverter.ToInt32(widthBytes, 0);

                // Move the file pointer to the height field (bytes 22-25)
                fileStream.Seek(22, SeekOrigin.Begin);

                // Read the height (4 bytes)
                byte[] heightBytes = new byte[4];
                fileStream.Read(heightBytes, 0, 4);

                // Convert the byte array to an integer representing the height
                int height = BitConverter.ToInt32(heightBytes, 0);

                // Display the width and height of the BMP image
                Console.WriteLine($"Width: {width} pixels");
                Console.WriteLine($"Height: {height} pixels");
            }
        }
        catch (Exception ex)
        {
            // Handle any errors that may occur while opening or reading the file
            Console.WriteLine("An error occurred: " + ex.Message);
        }
    }
}

 Output

Please enter the file path of the BMP image:
image.bmp
Width: 800 pixels
Height: 600 pixels