| ▼﹡ libraries | The xtd libraries |
| xtd.core | The xtd.core library contains all fundamental classes to access Hardware, Os, System, and more |
| xtd.drawing | The xtd.drawing library provides access to GDI+ basic graphics functionality |
| xtd.forms | The xtd.forms library contains classes for creating Windows-based applications that take full advantage of the rich user interface features available in the Microsoft Windows operating system, Apple macOS and Linux like Ubuntu operating system |
| xtd.tunit | The xtd.tunit library contains components needed for unit testing |
| debug | All needed for debugging and tracing |
| delegates | Contains delegates definitions |
| ▼drawing | All needed for drawing something |
| brushes | Represents brushes used to fill the interiors of graphical shapes such as rectangles, ellipses, pies, polygons, and paths |
| colors | Contains colors definitions |
| coordinates | Containes coordinates definitions |
| effects | Contains image effets definitions |
| fonts | Defines a particular format for text, including font face, size, and style attributes. This class cannot be inherited |
| helpers | Contains object helpers |
| images | Contains images definitions |
| pens | Contains pens definitions |
| texts | Contains texts definitions |
| events | Events are event args and event handler needed to response to window messages |
| exceptions | Contains exceptions definitions |
| format and parse | All needed for formating or parsing object |
| ▼forms | All needed for GUI application |
| application | Containes application definitions |
| components | Components are objects that an application uses in conjunction with another window |
| containers | Containers are container for other controls |
| controls | Controls are children windows that an application uses in conjunction with another window to enable interaction with the user |
| dialogs | Dalogs consist of the open file, save file, open folder, find and replace, print, page setup, font, color dialog boxes, about, busy, message dialog boxes, .. |
| forms | Contains forms definitions |
| menus and toolbars | Contains menus and toolbars definitions |
| renderers | Contains control renderers definitions |
| interfaces | Contains interfaces definitions |
| keywords | Keywords are predefined, reserved identifiers that have special meanings to the compiler |
| literals | Literals can be used to produce integer, float, character, duration and string types |
| style sheets | Contains various properties, states, and subcontrols that make it possible to customize the look of control |
| ▼system | Contains system classes |
| ▼collections | Contains collections definitions |
| ▼generic | Contains generic collections definitions |
| extensions | Contain generic collections and interfaces extensions |
| helpers | Contains generic collections helpers definitions |
| object model | Contains object model collections definitions |
| specialized | Contains specialized collections definitions |
| configuration | Contains configuration definitions |
| diagnostics | Contains diagnostics definitions |
| extensions | Contains interfaces extensions |
| globalization | Contains globalization objects |
| helpers | Contains object helpers |
| io | Contains io definitions |
| linq | Contains linq definitions |
| media | Contains media definitions |
| network | Contains network definitions |
| ranges | Contains ranges definitions |
| security | Contains the underlying structure of the security system, including base classes for permissions |
| strings | Contains mutable and immutable texts as a sequence of UTF-8, UTF-16 and TD-32 code units |
| synthesis | Contains classes for initializing and configuring a speech synthesis engine, for creating prompts, for generating speech, for responding to events, and for modifying voice characteristics |
| text | Contains text definitions |
| ▼threading | Contains threading definitions |
| tasks | Contains tasks definitions |
| timers | Contains timers definitions |
| web | Contains web definitions |
| system information | System information contains classes that provides informations about the current system environment |
| types | Contains types definitions |
| ▼unit tests | Contains unit tests definitions |
| assertions | Contains assertions definitions |
| assumptions | Contains assumptions definitions |
| validations | Contains validations definitions |