An object-oriented programming language developed by Microsoft that can be used in .NET.
KimW,
I upgraded to Visual Studio 17.10.2 yesterday and immediately got this annoying problem, which previous recent versions only seemed to occur randomly on opening some forms and lasted only for a few seconds. But now it is permanent. I search the internet for a solution and that brought me here yesterday but I found no solutions. So after some tinkering around I found a way to get around it until Microsoft fixes it.
On opening the code editor, if you edit any line of code the controls will reappear in the navigation bar middle dropdown list, but I did not want to tamper with the actual code itself.
The easiest way of fixing this problem is to open a form at or near the top of the solution explorer list, look for the first blank line and add a single apostrophe. As soon as this is done the dropdown list will show the controls. Making the change for one form will enable the dropdown list for all forms in the project, so you only have to do it once. However, when next you open the project the problem will return but it can be easily fixed again by removing the apostrophe (adding a second one would also work). Opening the project a third time you have to add the apostrophe again. Please note that adding spaces does not work.
Hope this helps.