base64ToImage

<Extension()> _
Public Function toImage(ByVal base64String As String) As Image
    Try

        Dim b As Byte()
        b = Convert.FromBase64String(base64String)
        Dim ms As New System.IO.MemoryStream(b, 0, b.Length)
        ms.Write(b, 0, b.Length)
        Return Image.FromStream(ms, True)
    Catch ex As Exception
        Return Nothing
    End Try
End Function

str_base64.ToImage