Steps to Reproduce:
--Install Bopomofo or Quick input method (Traditional Chinese).
--Open the Telerik SyntaxEditor in a WPF application.
--In any text input field, enter an Alt code (e.g., Alt+0160 for a non-breaking space).
--Attempt to type any Chinese characters immediately after entering the Alt code.

Current Behavior:
  -Bopomofo IME:
    -- The user cannot type any Chinese characters after entering an Alt code.
    -- Switching the language (e.g., pressing Shift) allows English input, but Chinese input remains blocked.

Quick IME:
   -The input method automatically switches to English after entering an Alt code.
   -The language indicator still shows Chinese, but characters typed are in English.
   T-o resume Chinese input, the user must click another text field, alt-tab to another window, then return.

Expected Behavior:
   -Users should be able to continue typing Chinese characters after entering Alt codes without needing to manually switch inputs.
   -The IME state should remain consistent, allowing uninterrupted input.

The CSharpTagger matches the following character combination as a multiline comment start - / * (slash and a start with a whitespace between). This causes wrong tags creation in scenarios where the * character is a part of a single line comment. The correct comment start and end should be /* and */.

In the following example, the beginning of the first single line comment is considered a multiline comment start, but since nothing closes it, the entire text is tagged and colored as a comment.

Add option to enable indent guides (vertical lines) between the code lines in the SyntaxEditor. 

Add spellcheck as you type feature.

When the EditorFontFamily is set to SegoeUI the RadSyntaxEditor can be placed over letters when changing it position.

Add dependency property for showing/hiding the line numbers on the left of the source code.

We could introduce API for customizing the folding region lines and their respective regions. For example, a customization could be hover-coloring of line regions, like in the latest VS:

Currently, the RadSyntaxEditor control does not have an out-of-the-box printing functionality.

Add functionality for precise positioning of the popups inside the RadSyntaxEditor control.

When using XML Tagger, XML Folding tagger with XML text document, the folding tagger freezes the UI while typing.
Generally in Visual Studio, the XML Folding tagger is processed in background while in SyntaxEditor this is done on the UI thread.
Several optimization options might be applied:

    - process xml folding in background

    - process folding similar to process search while typing - a period of inactivity time is needed to invalidate the search / folding

   - caching - if the edit does not change the folding configuration, no processing and redrawing of folding is required

  - some parts for extracting tooltip content and folded content should be optimized

We want to have the option to replace texts only in a selected part of the document. 

Use Notepad++ as a reference to check this feature.

Foldings are incorrect when there is a missing open or close tag.

Currently, if you load a big .xml file with big number of tags, the XmlFoldingTagger takes a lot of time to execute its logic. Improve the performance in those situations.

I do have some feedback on this component. I love it, but of course there are some areas where improvement can be made. For instance, in the screenshot below, I have highlighted some words where improvement can be made.

1. ‘1,2,3,5’ – Literals in SSMS are Red
2. ‘ER – 100% OF MEDICARE’ – OF is highlighted in Blue. It is contained in a literal and shouldn’t be highlighted
3. ISNULL – Is a function and should be highlighted in Blue

---- - It looks like that the tagger is only looking for 2 – only. If there are more than 2 in sequence, it doesn’t identify it as a comment and should

We could create intellisense similar to Visual Studio.

Add support for using right-to-left characters. This includes.
    - typing from right to left
    - proper selection, navigation between RTL chars
    - proper insert, delete, cut, copy, paste operations (modifications) sign

Python is one of the most important scripting languages. It would be nice if this language was supported by default.

Hello,

We would like to use SyntaxEditor by providing our own programming language definition. It would be great to have the ability to feed SyntaxEditor with a language definition file. This file could be use an EBNF-like format to provide syntax coloration.

Thanks & regards,

Add API for inserting code snippets like in Visual Studio.