arcengine 获得FeatureClass的坐标系SpatialReference

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public static ISpatialReference  getSpatialReference(IFeatureClass pFeatureClass)
{
           IGeoDataset pGeoDataset= pFeatureClass as IGeoDataset;
            return pGeoDataset.SpatialReference;

 }

原文：https://blog.csdn.net/u010598851/article/details/24663967