System.Net.HttpListenerRequest.Helpers.ParseMultivalueHeader C# (CSharp) Method

            internal static string[] ParseMultivalueHeader(string s)
            {
                if (s == null)
                    return null;

                int l = s.Length;

                // collect comma-separated values into list

                List<string> values = new List<string>();
                int i = 0;

                while (i < l)
                {
                    // find next ,
                    int ci = s.IndexOf(',', i);
                    if (ci < 0)
                        ci = l;

                    // append corresponding server value
                    values.Add(s.Substring(i, ci - i));

                    // move to next
                    i = ci + 1;

                    // skip leading space
                    if (i < l && s[i] == ' ')
                        i++;
                }

                // return list as array of strings

                int n = values.Count;
                string[] strings;

                // if n is 0 that means s was empty string

                if (n == 0)
                {
                    strings = new string[1];
                    strings[0] = string.Empty;
                }
                else
                {
                    strings = new string[n];
                    values.CopyTo(0, strings, 0, n);
                }
                return strings;
            }