The current implementation of the Code128 symbology class used with RadBarcode throws an InvalidSymbolException for characters with codes greater than 127.

As you can see from this table, there are many special characters in Code128 that have larger codes:

https://en.wikipedia.org/wiki/Code_128#Bar_code_widths

It would be useful to have these in applications which need to modify a reader device's behavior with barcode control characters in order to communicate properly.

Add a property that determines if the check digit (checksum) should be displayed. Currently, you can enable a checksum calculation that is displayed in the barcode image by setting the AutoChecksum property of the symbology to True, but there is no way to display the calculated value in the text under the barcode.

Implement support for Chinese symbols. Currently, if you enter the barcode Text in Chinese, the value will be coerced to to an empty string and nothing will be rendered.

Implement Intelligent Mail Barcode type.

Provide support for Swiss QR code.

Currently the Mode of the barcode can be set to determine whether alphanumeric characters or Kanji characters are allowed. We can introduce an option to allow both types of characters. 

Currently we can rotate the entire barcode so that it is inverted using styles, however, this means that the text with the barcode is also inverted and so it is displayed upside down. It would be nice to have the ability to "invert" the barcode portion only (turn the barcode upside down) 

There are solutions posted on the Telerik forums about how to accomplish this using styles but it would save people a lot of time and work (especially if they are using several barcode types) if there was a Boolean property that could be set to hide or display the barcode text (much like the RenderChecksum property is used to hide or display the checksum for the barcode)