Troubleshooting
For general Visual Studio troubleshooting information, refer to the official Microsoft documentation.
Below you can find more information on issues encountered while working with Visual Code and DIS, which are not related to DIS itself.
A solution is missing in the Solution Explorer
When you have created a solution, it can occur that this solution is not displayed in the Solution Explorer.
In that case, close Visual Studio, open Windows Explorer, go to the folder containing the solution, and double-click the .sln file. This will start Visual Studio and automatically load the solution. The Solution Explorer should then list all files contained in the solution.