System.Xml.Base64Decoder.ConstructMapBase64 C# (CSharp) Méthode

        private static byte[] ConstructMapBase64() {
            byte[] mapBase64 = new byte[MaxValidChar + 1];
            for ( int i = 0; i < mapBase64.Length; i++ ) {
                mapBase64[i]= Invalid;
            }
            for ( int i = 0; i < CharsBase64.Length; i++ ) {
                mapBase64[(int)CharsBase64[i]] = (byte)i;
            }
            return mapBase64;
        }