1             IGeometryCollection geometryCollection = new PolygonClass();
 2             IPointCollection pointCollection_ExteriorRing = new RingClass();
 3             pointCollection_ExteriorRing.AddPoint(upperLfetPoint);
 4             pointCollection_ExteriorRing.AddPoint(upperRightPoint);
 5             pointCollection_ExteriorRing.AddPoint(lowerRightPoint);
 6             pointCollection_ExteriorRing.AddPoint(lowerLeftPoint);
 7             IRing ring_Exterior = pointCollection_ExteriorRing as IRing;
 8             ring_Exterior.Close();
 9             geometryCollection.AddGeometry(ring_Exterior as IGeometry);
10 
11             IPointCollection pointCollection_InteriorRing = new RingClass();
12             pointCollection_InteriorRing.AddPoint(quadriCorners.UpperLeft);
13             pointCollection_InteriorRing.AddPoint(quadriCorners.UpperRight);
14             pointCollection_InteriorRing.AddPoint(quadriCorners.LowerRight);
15             pointCollection_InteriorRing.AddPoint(quadriCorners.LowerLeft);
16             IRing ring_Interior = pointCollection_InteriorRing as IRing;
17             ring_Interior.Close();
18             geometryCollection.AddGeometry(ring_Interior as IGeometry);
19 
20 
21             IPolygon polygon = geometryCollection as IPolygon;
22             IFeature featureBack = featureClass.CreateFeature();
23             featureBack.Shape = polygon;
24             featureBack.Store();