replace CrLf in textbox

I have a multiline textbox "Notes".
It contains the text:
"This is a line

And another line is here

And another one here"

I want to replace the CrLf with another character, but somehow asp.net doesnt see the Crlf

Now, I see two CrLf in the above text. But when I call Notes.IndexOf(vbCrLf) I get -1









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