Q: Opening a C# file in the project displays "Miscellaneous Files"
Editor>Preferences>External Tools>External Script Editor shows that VS2017 (internal) is bound, and
opening the C# file shows "miscellaneous files", and no project solution (*.sln) is automatically created
A: Check the VS Editor version of Package Manager
1° Window>Package Manager to find out whether the version of Visual Studio Editor needs to be updated, and find that only Visual Studio Code Editor
2° Select Visual Studio Code Editor version Remove; add Visual Studio Editor version 2.0.11
3° Check the binding status of External Script Editor, Has changed to VS2017 with version number. Open the C# file at this point, and the solution will be automatically created
