using System;

using static System.Math;

using Env = System.Environment;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Measurement with Parameterless Constrcutor");

        var m1 = new Measurement();

        Console.WriteLine(m1);

        var m2 =  default(Measurement);

        Console.WriteLine(m2);

        var m3 = new Measurement[2];

        Console.WriteLine(string.Join(", ", m3));

​

        Console.WriteLine("");

        Console.WriteLine("Measurement Without Explicit Constructor and Auto Initializer");

        var mwoc1 = new MeasurementWithoutConstructor();

        Console.WriteLine(mwoc1);

        var mwoc2 = default(MeasurementWithoutConstructor);

        Console.WriteLine(mwoc2);

        Console.WriteLine("");

        Console.WriteLine("Measurement With Explicit Constructor and Auto Initializer");

        var mwc1 = new MeasurementWithConstructor();

        Console.WriteLine(mwc1);

        var mwc2 = new MeasurementWithConstructor(5);

        Console.WriteLine(mwc2);

        var mwc3 = default(MeasurementWithConstructor);

        Console.WriteLine(mwc3);

    }

    public struct Measurement

    {

        public double Value {get; set;}

        public string Description {get; set;}

        public Measurement() {

            Value = 5;

            Description = "Measurment";

        }

        public override string ToString() => $"Value: {Value}, Description: ({Description})";

    }

    public struct MeasurementWithoutConstructor

    {

        public double Value {get; set;}

        public string Description {get; init;} = "Measurement";

        public override string ToString() => $"Value: {Value}, Description: ({Description})";

    }

​

    public struct MeasurementWithConstructor

    {

        public double Value {get; set;}

        public string Description {get; init;} = "Measurement";

        //uncomment this for auto property initializers to work

        public MeasurementWithConstructor() {

            Value = 1;

        }

        public MeasurementWithConstructor(double value) {

            Value = value;

        }

        public override string ToString() => $"Value: {Value}, Description: ({Description})";

    }

}