I am trying to remove a certain string from a textbox when a button is pressed. Although using replace isn't working out too well for me. Can someone give me a hand?

This is my code already.

vb Code:
  1. Dim rdystring As String = DisplayTextBox.Text
  2.         If InStr(rdystring, "Ready to begin.") Then
  3.             Replace(rdystring, "Ready to begin.", "")
  4.             DisplayTextBox.Clear()
  5.             DisplayTextBox.Text = rdystring
  6.         End If

I tried this before the one above:

vb Code:
  1. If InStr(Displaytextbox.text, "Ready to begin.") Then
  2.             Replace(Displaytextbox.text, "Ready to begin.", "")
  3.                End If