/// <summary> /// Takes an array of simple polygons and combines them into one multi-part shape. /// </summary> /// <param name="parts">The array of polygons.</param> /// <param name="resultShp">The resulting multi-part shape.</param> public static void CombineParts(ref IFeature[] parts, ref IFeature resultShp) { int numParts = parts.Length; Polygon po = new Polygon(parts[0].Coordinates); Polygon poly; for (int i = 0; i <= numParts - 1; i++) { poly = new Polygon(parts[i].Coordinates); po = poly.Union(po) as Polygon; } resultShp = new Feature(po); }