Problems when shuffling an array of strings

I am attempting to shuffle an array of strings, below is the segment of code i have already. However, a problem with this code is that alot of the times it shuffles the content but excludes one value. e.g shuffling A, B, C, D it will do this: A, D , , C.

Any help would be greatly appreciated.

Private rnd = New Random()

Public Sub Shuffle(ByRef List() As String)
    Dim Limit As Integer = List.Length - 1

    For i = Limit To 0 Step -1
        Dim j As Integer = rnd.Next(0, i + 1)
        Dim temp As String = List(i)
        List(i) = List(j)
        List(j) = temp
    Next
End Sub