BoldSignEasily embed eSignatures in your .NET applications. Free sandbox with native SDK available.
Hello,
Same issue here. Design page is getting totally blank by debugging. I have to close and reopen the page everytime i want to edit it. Just added an empty checkbox, combobox and numericUpDown. Don't have any errors.
PS: I had it also with errors like OP, can't remember exactly how, there are also many other not expected behaviours when editing the controls.
Regards