Convert the Char array back to a Byte array
Class Sample Public Shared Sub Main() Dim byteArray1(255) As Byte Dim byteArray2(255) As Byte Dim charArray(351) As Char Dim charArrayLength As Integer Dim x As Integer For x = 0 To byteArray1.Length - 1 byteArray1(x) = CByte(x) Next x charArrayLength = Convert.ToBase64CharArray( _ byteArray1, 0, byteArray1.Length, _ charArray, 0, _ Base64FormattingOptions.InsertLineBreaks) byteArray2 = Convert.FromBase64CharArray(charArray, 0, charArrayLength) End Sub End Class