This wraps the ObjectARX AcDbEdgeRef::AcDbEdgeRef() method.

Public Sub New(
    compoundObjectId As CompoundObjectId, 
    edgeSubentId As SubentityId, 
    faceSubentId As SubentityId, 
    curve As Curve3d
)

public EdgeRef(
    CompoundObjectId compoundObjectId, 
    SubentityId edgeSubentId, 
    SubentityId faceSubentId, 
    Curve3d curve
);