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;

            }

        }