c# - Visual Studio Code IntelliSense suggestions don't pop up automatically -

i followed install instructions in https://code.visualstudio.com, when write c# code, intellisense suggestions don't pop automatically, must trigger using shortcut command+space, meanwhile, suggestions code wrote.

here screen capture below:

i checked in https://code.visualstudio.com/docs/editingevolved, vscode support c# intellisense.

i don't think bug, maybe did wrong when installing vscode. how solve problem?

omnisharp doesn't know project files are. in screenshot, left sidebar says "you have not opened folder". omnisharp in opened folder project files.

1. add folder. file > open folder...
2. make sure have project file (either project.json or *.csproj files).

this should enough omnisharp start providing intellisense.