c# - Refresh user control instance inside a panel when a button is clicked -

i have these codes in mainform when click on picturebox, user control loads in panel.

my problem datagridviews inside other controls doesn't updated. when make transactions in other user controls affects other user controls.

what want automatically update gridviews refreshing user control when associated button clicked.

private void picturebox5_click(object sender, eventargs e) {     panel2.controls.add(uccustomer.instance);     uccustomer.instance.dock = dockstyle.fill;     uccustomer.instance.bringtofront();     lblmenu.text = "customer management"; }  private void picturebox2_click(object sender, eventargs e) {     panel2.controls.add(ucdelivery.instance);     ucdelivery.instance.dock = dockstyle.fill;     ucdelivery.instance.bringtofront();     lblmenu.text = "delivery management"; }  private void picturebox3_click(object sender, eventargs e) {     panel2.controls.add(ucreport.instance);     ucreport.instance.dock = dockstyle.fill;     ucreport.instance.bringtofront();     lblmenu.text = "reports"; } 

here's example on how declared instance user control. in same format other user controls.

private static uccustomer _instance; public static uccustomer instance {         {         if (_instance == null)             _instance = new uccustomer();         return _instance;     } }