The IFeature from where the trace begins. This is used so that the trace results can be show originating from the exact point that the user clicked on (we have to know the geometry of the line to make that happen). The base trace tool provides this parameter.

'Declaration
 
Public Property StartFeature As ESRI.ArcGIS.Geodatabase.IFeature

'Usage
 
Dim instance As TraceResultsRendererExt
Dim value As ESRI.ArcGIS.Geodatabase.IFeature
 
instance.StartFeature = value
 
value = instance.StartFeature

public ESRI.ArcGIS.Geodatabase.IFeature StartFeature {get; set;}