public bool AddFeature( ESRI.ArcGIS.Geometry.IGeometry geometry,System.Collections.Generic.Dictionary<string ,object> properties)        {            try            {                ESRI.ArcGIS.Geodatabase.IFeature feature = _featureLayer.FeatureClass.CreateFeature();                 int index;                index = feature.Fields.FindField("Shape");                IGeometryDef pGeometryDef;                pGeometryDef = feature.Fields.get_Field(index).GeometryDef as IGeometryDef;                 if (pGeometryDef.HasZ)                {                    IZAware pZAware = (IZAware)geometry;                    pZAware.ZAware = true;                    //IZ iz1 = (IZ)geometry;                    //iz1.SetConstantZ(0);  //将Z值设置为0                    IPoint point = (IPoint)geometry;                    point.Z = 0;                }                else                {                    IZAware pZAware = (IZAware)geometry;                    pZAware.ZAware = false;                }                if (pGeometryDef.HasM)                {                    IMAware pMAware = (IMAware)geometry;                    pMAware.MAware = true;                }                else                {                    IMAware pMAware = (IMAware)geometry;                    pMAware.MAware = false;                }                  feature.Shape = geometry;                foreach (string key in properties.Keys)                {                    SetFeatueProperty(feature, key, properties[key]);                }                                 feature.Store();                  return true;            }            catch (Exception ee)            {                return false;            }        }