What is the method in C# for manipulating low-level bytes?

In C#, you can use the unsafe keyword and pointers to directly manipulate the underlying bytes. By using pointers, you can access byte data at specific locations in memory. Here is an example:

unsafe
{
    byte[] data = new byte[4];
    fixed (byte* pData = data)
    {
        // 使用指针访问字节
        pData[0] = 0x01;
        pData[1] = 0x02;
        pData[2] = 0x03;
        pData[3] = 0x04;

        // 读取字节
        byte value = pData[2];
        Console.WriteLine(value); // 输出 3
    }
}

It is important to note that using unsafe code blocks requires enabling the “Allow unsafe code” option in the project properties. Caution should be exercised when manipulating low-level bytes to ensure no memory leaks or other issues occur.