It has almost all the features that can be found in the Visual Studio.NET code Editor, including customizable syntax highlighting, code outining, code completion, unlimited undo/redo, bookmarks, word wrap, drag-n-drop, search/replace, and displaying utter/margin/line numbers.

Editor.NET component pack includes:

SyntaxEdit multi-line text edit control.
TextSource component storing actual data being viewed and edited by the edit control.
Parser component used to highlight syntax for the edit control content.
30 predefined syntax schemes for most known programming languages.
Advanced parsers for C#, VB.NET, J# and XML.
Additional color editor.
Standard Search, Replace, Goto Line and Editor Settings dialogs.

Features :

Customizable syntax highlighting. Editor.NET is designed to highlight syntax for virtually unlimited set of programming languages.
.NET syntax parsing. Editor.NET supports a concept of syntax parsing that allows to build abstract syntax tree used for code outlining, code formatting and code completion features. Complete syntax parsing is supported for .NET languages such as C#, VB and J#.
Code Completion. Editor.Net supports code completion (intellisense) feature, allowing displaying code completion ListBox and ToolTip to display appropriate functions, statements and constants.
Code Snippets. Editor.Net provides a way to insert frequently used fragments of the code into the editor by pressing Tab key after snippet shortcut or by executing code snippet popup window.
Word Wrap. Words can be automatically wrapped to the beginning of the next line when necessary.
Selection. Editor.NET supports a concept of text selection and a wide range of operations on it, including copy/pasting operations, drag-n-drop, indenting/outdenting, lowercasing/uppercasing, etc.
Code Outlining is a text navigation feature that can make navigation of large structured texts more comfortable and effective. Outline sections can be collapsed for viewing structure of the text being edited.
Gutter. The gutter area can be used to display bookmarks, line numbers or outline sections.
Multiple views of the same text. You can edit the same text in several editors. Only one copy of the text is stored and the changes are automatically displayed in all linked editors
Unlimited undo/redo allows to roll back changes made to the text. Undo limit and undo blocks are supported.

And more ...

Platform: Windows 98, Windows Me, Windows 2000, Windows XP, Windows 2003, Windows Vista

System Requirements: .NET FrameWork 2.0/3.5 Microsoft Visual Studio.NET 2005/2008