'Declaration Public ReadOnly Property FillRectangle As EdgeExtent
public EdgeExtent FillRectangle {get;}
The center shade fills the entire tile except the margins specified by each property.
Each edge of the center shade rectangle is defined by a percentage offset from the corresponding edge of the tile rectangle.
A positive percentage specifies an inset, while a negative percentage specifies an outset.
This property has NO effect if the Type property is GradientType.Linear.
'Declaration Public ReadOnly Property FillRectangle As EdgeExtent
public EdgeExtent FillRectangle {get;}