what cells are selected => print in msgbox

I have an event on my worksheet: worksheet_SelectionChange.
now i want to popup a msgbox that displays what is selected.
for example i select A1:B1
then the msgbox has to display this string: "A1:B1"

Code:

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Private Sub worksheet_SelectionChange(ByVal Target As Range)

    'msgbox ?????

End Sub

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Code:

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msgbox selection.address

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