Hi i keep getting an error here and cant seem to fix it :/

VB CODE
Code:
    Private Sub Button10_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button10.Click

        If ListBox1.Items(0).ToString = Nothing Then
            MsgBox("this is nothing")
        Else
            MsgBox("something is there")
        End If

    End Sub
ERROR:
System.ArgumentOutOfRangeException was unhandled
Message="InvalidArgument=Value of '0' is not valid for 'index'. Parameter name: index"

Now i know that the error means that there there is nothing in "0" but my code above should check that but its not :/

What have i done wrong ?

Thanks for any help