After reading the text into a variable, let’s try splitting with Split method:
Split(textContent, “10/20”).ToArray
Loop this Array & so each splitted text can be saved into different text files.
arrStr = System.Text.RegularExpressions.Regex.Split(strData,"(?=^10/20)",System.Text.RegularExpressions.RegexOptions.Multiline).Where(Function(s) not String.IsNullOrEmpty(s)).ToArray