Question

I have a byte list variable which I store byte array information here:

internal List<Byte> portBuffer = new List<Byte>();

And I have another byte array variable:

byte[] ret_bytes = { 0x4F, 0x4B };

How can I find out if ret_bytes is inside the portBuffer? The code below seems like not correct.

portBuffer.Contains(ret_bytes)

Another question, how to find out the position of the first element of ret_bytes in side the portBuffer list if it is inside the list?

Thanks

Answer 1

Contains doesn’t find one sequence within another, it finds one element within a sequence – I don’t believe there’s anything within .NET which will do what you want out of the box.

It’s up to you whether you write a very general purpose implementation or one that just solves your current issue – the former is likely to be more work, but may pay dividends in the long run.

If you only need to find two bytes, I’d be tempted to just iterate:

for (int i = 0; i < list.Count - 1; i++)
{
    if (list[i] == 0x4f && list[i + 1] == 0x4b)
    {
        // Got it
    }
}