Question

I previously used the following code to find the first occurrence of a text in a string.

int index = myString.IndexOf(“AB”);

Now I will change the software so it will look for first occurrence of the two bytes in a List. Is it possible to do with Linq?

Edit

The program purpose is to communicate via the serial port. Previously the program managed data with a string. But it are strange to handle binary data in a string. So I change the program so that data is handled in a List<byte> instead.

Answer 1

Pure LINQ:

var arr = new byte[] { 1, 2, 3, 4, 5, 6 };

var res = arr.Zip(arr.Skip(1), (a, b) => new { a, b }).Select((x, i) => new { x, i })
    .FirstOrDefault(v => v.x.a == 3 && v.x.b == 4);


if (res != null)
{
    Console.WriteLine(res.i);
}