# Object Design

This class diagram shows the main relationships between the most commonly used classes:

General class diagram

Class dragged onto a form to instantiate a PropertyGrid. It contains an optional toolbar, the actual grid, and an optional comments area.

Internal control handling the true two-columns grid. You never directly interact with this class. It contains a collection of Properties.

One row in the grid. You usually use an enumerator to access this. It keeps a reference on a value.

Class handling the value of the .Net property. Several internal types of values exist. These handle:

Properties represented by PropertyDescriptor classes (found by reflection using SelectedObject(s) or AppendProperty-like methods).
Properties simulated by a TypeConverter.
Virtual Properties (added using AppendManagedProperty).

Handles custom painting for a Property.

Each kind of PropertyFeel (derived class) is a singleton that handles one kind of particular inplace control.

Interface used by each kind of inplace control, which is above all a derived class of the WinForms Control class.

Base class used by all validator classes, i.e. classes checking a user-entered value is correct.

Class that encapsulates a reference to a Property instance. An enumerator can be stored and used to navigate the collection of Properties.

PropertyDeepEnumerator: a bidirectional enumerator, this browses all Properties, including the hidden ones, in display order.
PropertySiblingEnumerator: a bidirectional enumerator, this browses a parent's direct children, including the hidden ones. It only browses one level.
PropertyVisibleDeepEnumerator: as PropertyDeepEnumerator, except ignores hidden Properties.
PropertyVisibleSiblingEnumerator: as PropertySibilingEnumerator, except ignores hidden Properties.

Base class used to modify the global appearance of the PropertyGrid.