customview

I work on an project for more than a year now. In designer I can choose CustumView and do all I want. Today, I make a small project for testing, in designer the customview is grayed. Additional Libraries have same link in two projects What happen? I reload my first project and CustomView is...

I work on an project for more than a year now. In designer I can choose CustumView and do all I want. Today, I make a small project for testing, in designer the customview is grayed. Additional Libraries have same link in two projects What happen? I reload my first project and CustomView is...