How to split A string into Array of Strings without using .Split()

public String[] SplitText(String txt, char[] delim)
        {
            if (txt == null)
                return new String[0]; // or exception
            if (delim == null || delim.Length == 0)
                return new String[0]; // or exception

            char[] text = txt.ToCharArray();
            string[] result = new string[1]; // If there is no delimiter in the string, return the whole string
            int part = 0;
            int itemInArray = 1;

            for (int i = 0; i < text.Length; i++)
            {
                if (IsIn(delim, text[i]))
                {
                    Array.Resize(ref result, ++itemInArray); // Is it consider as a framework method ???
                    part++;
                }
                else
                    result[part] += text[i];
            }
            return result;
        }
        public static Boolean IsIn(char[] delim, char c)
        {
            for (int i = 0; i < delim.Length; i++)
                if (c == delim[i])
                    return true;
            return false;
        }

char[] delimter = new char[1];
delimter[0] = '-';
string[] b = SplitText("Your-string-goes-here", delimter);