Does anyone else have this issue? There does not seem to be a way to edit the Solution Explorer toolbar. One of the icons for Solution Explorer is missing in my C# projects.
I am using Version 16.10.3.
Folks, I figured out the issue. When you create a .NET Core 5.0 project the VS environment is setup different. I deleted the .NET 5.0 project and recreated as a .NET Standard one with the same name and the icon showed up again.
In fact, the Studio 'solution' version is different although your using the exact same VS application. Problem solved for now.