Errorl OutOfMemoryException Listview

Question

I use listview to display data ( there are 20000 records ) but for some reason it is crashing . Anyone have a way to fix this? Thank you

  System.Windows.Data.Binding lisproxy = new System.Windows.Data.Binding()
                {
                    Source = listViewTableProxy,
                };

                listViewDocuments.SetBinding(System.Windows.Controls.ListView.ItemsSourceProperty, lisproxy);