omnisharp.json

{
    "FormattingOptions": {
        "NewLinesForBracesInLambdaExpressionBody": false,
        "NewLinesForBracesInAnonymousMethods": false,
        "NewLinesForBracesInAnonymousTypes": false,
        "NewLinesForBracesInControlBlocks": false,
        "NewLinesForBracesInTypes": false,
        "NewLinesForBracesInMethods": false,
    "NewLinesForBracesInProperties": false,
    "NewLinesForBracesInAccessors": false,
        "NewLineForElse": false,
        "NewLineForCatch": false,
        "NewLineForFinally": false
    }
}