Resume previous index during a search

Hi,

am trying to resume previous index during a search for matches from a file from the code below, incase an application loses Internet Connection. How do you achieve this in .NET?

Code:

---

Wordintext = Wordrepcemnts.Keys.ElementAt(WordintextIndex)

 foundWordintextIndex = RichTextBox1.Find(Wordintext, 0, RichTextBox1.Text.Length, RichTextBoxFinds.WholeWord)
    If foundWordintextIndex > -1 Then

For Each Wordforrep In Wordrepcemnts(Wordintext)
               
'do something here


                Next

---

Find returns the index. Then you can use an overload of Find that includes the starting index.
But since you have the text in a RTB, how losing internet connection affect it?