GeometryCollection.ComputeEnvelopeInternal Method

Returns the minimum and maximum x and y value1s in this Geometry, or a null Envelope if this Geometry is empty.

[Visual Basic]
Overrides Protected Function ComputeEnvelopeInternal() As Envelope

[C#]
protected override Envelope ComputeEnvelopeInternal();

Returns this Geometrys bounding box; if the Geometry is empty, Envelope.IsNull will return true

Unlike getEnvelopeInternal, this method calculates the Envelope each time it is called; getEnvelopeInternal caches the result of this method.