public static bool QueryMessPoint(IActiveView activeView, IFeatureClass featureClass, string whereClause, ISpatialReference spatRef, out IGeometry geometry){            try            {                ESRI.ArcGIS.Geodatabase.IQueryFilter queryFilter = new ESRI.ArcGIS.Geodatabase.QueryFilterClass();                queryFilter.WhereClause = whereClause;                ESRI.ArcGIS.Geodatabase.IFeatureCursor featureCursor = featureClass.Search(queryFilter, false);                geometry = Geometry.GeometryOp.ConstructUnion(featureCursor);                IGeoDataset geodataset = featureClass as IGeoDataset;                geometry.SpatialReference = geodataset.SpatialReference;                geometry.Project(spatRef);                return true;            }            catch (System.Exception ex)            {                System.Diagnostics.Debug.Write(ex.Message);                geometry = null;                return false;            }}