【C#】记ArcObject下的几何投影变换的一个需要注意的坑

翻出陈年代码重写，老是报”The coordinates or measures are out of bounds.“

找来找去发现错误出在下面snippet里，geometry.Project(spatialReferenceTo)会对传入的point处理，所以应该带ref关键字以示提醒。

 /// <summary>
        /// 平面坐标系点转地理坐标系点，在ArcGIS平台下
        /// </summary>
        /// <param name="point">平面坐标系下的点</param>
        /// <param name="factoryCodeFrom"></param>
        /// <param name="factoryCodeTo">默认2000地理坐标系</param>
        public static void PointProjectedToGeographicOnArcGISPlatform(ref IPoint point,int factoryCodeFrom,int factoryCodeTo=4490 )
        {
            ISpatialReferenceFactory spatialReferenceFactory = new SpatialReferenceEnvironmentClass();
            ISpatialReference spatialReferenceFrom = spatialReferenceFactory.CreateProjectedCoordinateSystem(factoryCodeFrom);
            ISpatialReference spatialReferenceTo = spatialReferenceFactory.CreateGeographicCoordinateSystem(factoryCodeTo);
            IGeometry geometry = point as IGeometry;
            geometry.SpatialReference = spatialReferenceFrom;
            geometry.Project(spatialReferenceTo);
        }