Setting C# formatting options for OmniSharp on Visual Studio Code?

I'm attempting to take advantage of the integration with Visual Studio Code, but can't figure out how to set the C# formatting options. The config.json right next to the OmniSharp exe on my Mac (/Applications/Visual Studio Code.app/Contents/Resources/app/extensions/jrieken.vscode-omnisharp/bin/packages/OmniSharp/config.json) doesn't match the standard OmniSharp config.json format, so setting the brace + newline behavior properties isn't working, e.g. methodBraceStyle. It does work to set the tabSize, etc., however.