删除Personal Geodatabase中的FeatureClass

try
            {
                IWorkspaceName pWorkspaceName = new WorkspaceNameClass();
                pWorkspaceName.WorkspaceFactoryProgID = "esriDataSourcesGDB.AccessWorkspaceFactory";
                pWorkspaceName.PathName = mdbPath + "GIR_DB.mdb";
                IName n = pWorkspaceName as IName;
                IFeatureWorkspace Workspace = n.Open() as IFeatureWorkspace;
                IFeatureClass tmpfeatureclass;
                tmpfeatureclass = Workspace.OpenFeatureClass("Tmp_Road_Geocoded");
                IDataset set = tmpfeatureclass as IDataset;
                set.CanDelete();
                set.Delete();

            }
            catch
            {
            }