using System;

​

public class DelegateCodeDemo

{

    public static void Main()

    {

        RecorderStats[] allRecorders = new RecorderStats[]

        {

            new RecorderStats("SWX01",10.5, 8000, 12),

            new RecorderStats("SWX02",12.0, 1600, 10),

            new RecorderStats("SWX03",23.6, 32000, 35),

            new RecorderStats("SWX04",15.5, 900, 21),

            new RecorderStats("SWX05",13.6, 8000, 3),

            new RecorderStats("SWX06",5.1, 8000, 20),

            new RecorderStats("SWX07",7.8, 8000, 40),

            new RecorderStats("SWX08",21, 8000, 16),

            new RecorderStats("SWX09",30.4, 8000, 18),

            new RecorderStats("SWX10",6.5, 8000, 5)

        };

        Console.WriteLine(DisplayRecorders.DisplayResult(allRecorders));

    }

}

​

public class DisplayRecorders

{

    private delegate double DelegateTopValue(RecorderStats stats);

    public static string DisplayResult(RecorderStats[] allRecorders)

    {

        string recorderWithLongestRecording = GetRecorderTopStats(allRecorders, stats => stats.RecordingLength_s);

        string recorderWithHighestGain = GetRecorderTopStats(allRecorders, stats => stats.AudioGain_dB);

​

        return "Recorder " + recorderWithLongestRecording + " has the longest recording time\n" +

                "Recorder " + recorderWithHighestGain + " has the highest gain.";

​

    }

​

    private static string GetRecorderTopStats(RecorderStats[] allRecorders, DelegateTopValue statsChooser)

    {

        string name = "";

        double longestRecording = 0;

​

        foreach (RecorderStats stats in allRecorders)

        {

            double duration = statsChooser(stats);

            if(duration > longestRecording)

            {

                longestRecording = duration;

                name = stats.RecorderName;

            }

        }

​

        return name;

     }

}

​

public class RecorderStats

{

    private string recorderName;

    private double recordingLength_s;

    private double samplingRate_Hz;

    private double audioGain_dB;

​

    public string RecorderName

    {

        get { return recorderName; }

    }

    public double RecordingLength_s

    {

        get { return recordingLength_s; }

    }

    public double SamplingRate_Hz

    {

        get { return samplingRate_Hz; }

    }

    public double AudioGain_dB

    {

        get { return audioGain_dB; }

    }

​

    public RecorderStats(string RecorderName, double RecordingLength_s, double SamplingRate_Hz, double AudioGain_dB)

    {

        this.recorderName = RecorderName;

        this.recordingLength_s = RecordingLength_s;

        this.samplingRate_Hz = SamplingRate_Hz;

        this.audioGain_dB = AudioGain_dB;

    }

}