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[TestFixture]
public class Valid
{
    [Test]
    public void TestReportGeneration()
    {
        var sensorName = "TempSensor 1";
        var fileName = "FileName.txt";
        var sensor = new Sensor(sensorName, new List<double>() { 1.0D });

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public class Sensor
{
  public string Name { get; }
  public List<double> MeasuredValues { get; }
  public double AverageValue
    => MeasuredValues.Average();
  public double MinimumValue
    => MeasuredValues.Min();
  public double MaximumValue
    => MeasuredValues.Max();

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public class Sensor
{
    public string Name { get; }
    public List<double> MeasuredValues { get; }
    public double AverageValue
       => MeasuredValues.Average();
    public double MinimumValue
        => MeasuredValues.Min();
    public double MaximumValue
        => MeasuredValues.Max();

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namespace Open_Closed_Principle.Valid
{
    public class AvgTemperatureReader
    {
        public double GetAverageTemperature(List<ITemperatureSensor> sensors)
        {
            return sensors.Count == 0 ? 0 : sensors.Average(s => s.CurrentTemperature.Value);
        }
    }
}

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namespace Open_Closed_Principle.Violation
{
    public class AvgTemperatureReader
    {
        public double GetAverageTemperature(List<object> temperatureSensors)
        {
            double total = 0;
            int count = 0;
            
            foreach (var temperatureSensor in temperatureSensors.OfType<IndoorTemperatureSensor>())

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namespace LiskovSubstitutionPrinciple.Tests
{
    [TestFixture]
    public class Violation
    {
        [Test]
        public void RectangleIsOkay()
        {
            Rectangle rect = new Rectangle
            {

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namespace LiskovSubstitutionPrinciple.Violation
{
    public class Rectangle
    {
        protected int _width;
        protected int _height;

        public virtual int Height
        {
            get { return _height; }

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class Person
{
    public int Age { get; }
    public string Name { get; }
    
    public Person(int age, string name)
    {
        this.Age = age;
        this.Name = name;
    }

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public class Program
{
    public static void Main(string[] args)
    {
        PowerOf2Example();
    }
    
    private static void PowerOf2Example()
    {
        var numbers = new List<int>() {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};

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class Engine
{
    public bool IsRunning { get; private set; } 
    public void Start() { }        
    public void Stop() { }
}

class Machine
{
    public Engine Engine { get; }