Microsoft.Common.Core.Logging.FileLogWriter.GetStringToWrite C# (CSharp) Method

        private string GetStringToWrite(MessageCategory category, string message) {
            var categoryString = GetCategoryString(category);
            var prefix = Invariant($"[{DateTime.Now:yy-M-dd_HH-mm-ss}]{categoryString}:");
            if (!message.Take(message.Length - 1).Contains('\n')) {
                return prefix + message;
            }

            var emptyPrefix = new string(' ', prefix.Length);
            var lines = message.Split(_lineBreaks, StringSplitOptions.RemoveEmptyEntries)
                .Select((line, i) => i == 0 ? prefix + line + "\n" : emptyPrefix + line + "\n");
            return string.Concat(lines);
        }