vb.net - Undefined UserControl error -


i created usercontrol in application, problem have every time edit code of usercontrol have delete usercontrols added gui because fails compile.

the project / application called panel , usercontrol called timerpanel, contains couple of text boxes within groupbox.

the error reads

type 'panel.timerpanel' not defined.

the strange thing works ok until edit usercontrol.

like said, if delete usercontrol gui, compiled , added again gui control, works ok.

i read somewhere on forum must add reference system.windows.forms, , did , behaves same.

what can doing wrong?

when error go , build project again, see if fixes issue (building project again fixes lots of errors , when add/change user control needed use it)


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