string.replace method not replacing strings in 2

In the example below, the replace method does nothing at all!
Am I using this incorrectly?
Dim mastertemplate As String = Me.txtNewsLetterTemplate.Text
            mastertemplate.Replace("[title]", Me.txtNewsLetterTitle.Text.Trim)

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Replace does not change the string itself, but returns the changed string...

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Daniel ReynoldsSoftware Applications Developer / IntegratorCommented:
so you would need to assign the new value as such
mastertemplate = mastertemplate.Replace("[title]", Me.txtNewsLetterTitle.Text.Trim)
bd9000Author Commented:
oooh! duh!
I was not thinking
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