C# segment text by special character

c#SegmentTextBySpecialCharacter.cs

 list.Add(text);

            string temporary = "";
            string main_text = "";

            foreach (string item in list)
            {
                for (int i = 0; i < item.Length; i++)
                {
                    temporary = item[i].ToString();
                    metin_tam = main_text + temporary;
                    if (gecici == character) //parameter
                     {
                        list_tam.Add(metin_tam.Substring(0, metin_tam.Length - 1));
                        metin_tam = "";
                    }
                    gecici = "";
                }
                listBox1.Items.Add(metin_tam);
                for (int i = 0; i < liste_tam.Count; i++)
                {
                    listBox1.Items.Add(liste_tam[i]);
                }
            }