using System;

using System.Text;

public class Program

{

    public static void Main()

    {

        var hello = "hello";

        var bytes = Encoding.ASCII.GetBytes(hello);

        Console.WriteLine(bytes.Length);

        var data = new byte[10];

        for (int i = 0; i < bytes.Length; i++)

        {

            var chunk = bytes[i];

            //data.CopyTo(data, i)

            bytes.CopyTo(data, 0);

            Console.WriteLine(chunk);

        }

        Console.WriteLine("");

        foreach (var chunk in data)

        {

            Console.WriteLine(chunk);

        }

        Console.WriteLine("");

        Console.WriteLine(GetDataLength(data));

        Console.WriteLine(GetDataLength(new byte[]{}));

        Console.WriteLine(GetDataLength(new byte[10]));

        Console.WriteLine(GetDataLength(null));

        Console.WriteLine("yep");

    }

​

​

    public static int GetDataLength(byte[] array)

    {

        if (array == null)

        {

            return 0;

        }

        for (int i = array.Length - 1; i > -1; i--)

        {

            if (array[i] > 0) { return i + 1; }

        }

        return 0;

    }  

}