## PropertyKeyedCollection< T > class

A base class of collection of properties.

## Methods

| Name | Description |
| --- | --- |
| [Add](./add/) | Creates a new custom property. |
| [Contains](./contains/) | Determines whether the Aspose::Tasks::Properties::PropertyCollection<T> contains a property with the specified name. |
| [get_Count](./get_count/) | Gets the number of properties in the collection. |
| [get_IsReadOnly](./get_isreadonly/) | Gets a value indicating whether this collection is read-only; otherwise, false. |
| [get_Names](./get_names/) | Gets the collection of all property names. |
| [idx_get](./idx_get/) | Gets the Property associated with the specified key. |