public enum GeoType{Point,Line,Polygon,Anno,Raster,AttrTable,Unknown};

public static GeoType GetGeoType(object GeometryType,object FeatureType)
        {
            if (GeometryType == DBNull.Value)
                return GeoType.AttrTable;
            else if(GeometryType.ToString() == "2")
            {
                return GeoType.Point;
            }
            else if (GeometryType.ToString() == "3")
            {
                return GeoType.Line;
            }
            else if(GeometryType.ToString() == "4")
            {
                if (FeatureType.ToString() == "1")
                    return GeoType.Polygon;
                else if (FeatureType.ToString() == "11")
                    return GeoType.Anno;
                else if (FeatureType.ToString() == "14")    
                    return GeoType.Raster;
                else
                    return GeoType.Unknown;
            }
            else
            {
                return GeoType.Unknown;
            }    
        }