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Represents a collection of Geometry objects.
GeometryCollection defines no methods or properties beyond the basic Collection methods and properties. Methods such as Add or GetItem will expect or return objects that are of type Geometry. Geometry itself is an abstract object, so the returned objects might be any of the Geometry defined types.
The XAML syntax for properties that use a GeometryCollection is an example of implicit collection syntax, in which you can omit an actual GeometryCollection object element. Explicitly including a GeometryCollection object element is permissible XAML syntax and might be useful if you intend to name the collection in XAML and manipulate its contents through script later.
A GeometryCollection is not itself a composite geometry, but it is used by the GeometryGroup to store Geometry objects that define a composite geometry.
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