public bool Flush()

in src/log4net/Repository/LoggerRepositorySkeleton.cs [595:630]
27 lines of code
10 McCabe index (conditional complexity)

        public bool Flush(int millisecondsTimeout)
        {
            if (millisecondsTimeout < -1) throw new ArgumentOutOfRangeException("millisecondsTimeout", "Timeout must be -1 (Timeout.Infinite) or non-negative");

            // Assume success until one of the appenders fails
            bool result = true;

            // Use DateTime.UtcNow rather than a System.Diagnostics.Stopwatch for compatibility with .NET 1.x
            DateTime startTimeUtc = DateTime.UtcNow;

            // Do buffering appenders first.  These may be forwarding to other appenders
            foreach(log4net.Appender.IAppender appender in GetAppenders())
            {
                log4net.Appender.IFlushable flushable = appender as log4net.Appender.IFlushable;
                if (flushable == null) continue;
                if (appender is Appender.BufferingAppenderSkeleton)
                {
                    int timeout = GetWaitTime(startTimeUtc, millisecondsTimeout);
                    if (!flushable.Flush(timeout)) result = false;
                }
            }

            // Do non-buffering appenders.
            foreach (log4net.Appender.IAppender appender in GetAppenders())
            {
                log4net.Appender.IFlushable flushable = appender as log4net.Appender.IFlushable;
                if (flushable == null) continue;
                if (!(appender is Appender.BufferingAppenderSkeleton))
                {
                    int timeout = GetWaitTime(startTimeUtc, millisecondsTimeout);
                    if (!flushable.Flush(timeout)) result = false;
                }
            }

            return result;
        }