How do i edit raw data from a file in bytes?

Question

I want to edit raw data from files (Hex) but i don't know how can i do it

Is there any package that can help me?

Also how do i convert strings in raw bytes?

I've tried some solutions out of google but none of these worked

Answer 1

Here's a function that:

1. Reads all the bytes from a file
2. Changes the second byte to the decimal value 8
3. Writes the bytes back to the file

Note, this is not the most efficient way to do this, but it's an example.

public async Task ChangeSomeBytesInFileAsync(string path)
{
    var bytes = await File.ReadAllBytesAsync(path);

    bytes[2] = 0b0000_01000;
    
    await File.WriteAllBytesAsync(path, bytes);
 }

To get the bytes of a string use the Encoding class and the appropriate encoding In this example, I'm using UTF-8.

var bytes = Encoding.UTF8.GetBytes(@"some value");