using System;

public class Program

{

    public static void Main(string[] args)

    {

        //Test function to read string until stop

        Console.WriteLine("22323ë-1.jpg".GetUntilOrEmpty());

        var myString = "22323ñ-1.jpg".Substring(0, 8);

        Console.WriteLine("Length is: " + myString.Length + " of string: " + myString);

        Console.WriteLine(System.Text.ASCIIEncoding.Unicode.GetByteCount(myString));

        Console.WriteLine(System.Text.ASCIIEncoding.ASCII.GetByteCount(myString));

        //Convert string to utf8

        byte[] bytes = System.Text.Encoding.UTF8.GetBytes(myString);

        var utf8String = System.Text.Encoding.UTF8.GetString(bytes);

        Console.WriteLine(utf8String + "");

    }

}

​

static class Helper

{

    public static string GetUntilOrEmpty(this string text, string stopAt = "-")

    {

        if (!String.IsNullOrWhiteSpace(text))

        {

            int charLocation = text.IndexOf(stopAt, StringComparison.Ordinal);

            if (charLocation > 0)

            {

                return text.Substring(0, charLocation);

            }

        }

        return String.Empty;

    }

}