How to disable auto hide solution explorer (Visual Studio 2017)?
Every time after launching the project, the solution explorer does autohide.
How disable it?
In the "Help" menu of Visual Studio, you find "Manage Visual Studio Performance".
Inside this you find "Team Explorer - Home" in "Tool Windows" and if this is not set to "Use default behaviour", you will likely find the sidebar hidden both on startup and after debugging.
If you, like me, have your Solution Explorer and Team Explorer docked together, this is the behaviour you will see.