Canvas.Top Attached Property
Gets or sets the distance between the top of an element and the top of its parent Canvas.
Assembly: System.Windows (in System.Windows.dll)
Dependency property identifier field: TopProperty
Negative values are permitted. A negative value places the origin of the element where is applied off-screen to the top side of the content area.
This property is an example of an attached property, whereby non-Canvas objects can set this property that can then be read and interpreted by a parent Canvas. For more information about attached properties, see Attached Properties Overview.
The value is interpreted by any immediate parent Canvas. If there are nested canvas elements, values for that do not come from immediate child elements are ignored. A Canvas can itself have a value, but the value does not apply on itself, rather it is interpreted by any parent Canvas, as in the nested scenario mentioned.
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.