using System;

using System.Collections;

using System.Collections.Generic;

using System.Globalization;

using System.Linq;

using System.Reflection;

using KGySoft.CoreLibraries;

​

public static class Example

{

    public static void Main()

    {

        var rnd = new Random();

​

        // Next... for all simple types:

        Console.WriteLine(rnd.NextBoolean());

        Console.WriteLine(rnd.NextDouble(Double.PositiveInfinity)); // see overloads

        Console.WriteLine(rnd.NextString()); // see overloads

        Console.WriteLine(rnd.NextDateTime()); // also NextDate, NextDateTimeOffset, NextTimeSpan

        Console.WriteLine(rnd.NextEnum<ConsoleColor>());

        // and NextByte, NextSByte, NextInt16, NextDecimal, etc.

​

        // NextObject: for practically anything. See also GenerateObjectSettings.

        Console.WriteLine(rnd.NextObject<Person>().Dump()); // custom type

        Console.WriteLine(rnd.NextObject<ValueTuple<int, string>>()); // tuple

        Console.WriteLine(rnd.NextObject<IConvertible>()); // interface implementation

        Console.WriteLine(rnd.NextObject<MarshalByRefObject>()); // abstract type implementation

        Console.WriteLine(rnd.NextObject<int[]>().Dump()); // array

        Console.WriteLine(rnd.NextObject<IList<IConvertible>>().Dump()); // some collection of an interface

        Console.WriteLine(rnd.NextObject<Func<DateTime>>().Invoke()); // delegate with random result

​

        // specific type for object (useful for non-generic collections)

        Console.WriteLine(rnd.NextObject<ArrayList>(new GenerateObjectSettings

        {

            SubstitutionForObjectType = typeof(ConsoleColor)

        }).Dump());

​

        // literally any random object

        Console.WriteLine(rnd.NextObject<object>(new GenerateObjectSettings

        {

            AllowDerivedTypesForNonSealedClasses = true

        })/*.Dump()*/); // dump may end up in an exception for property getters

    }

​

    private static string Dump(this object o)

    {

        if (o == null)

            return "<null>";

​

        var convertible = o as IConvertible;

        if (convertible != null)

            return convertible.ToString(CultureInfo.InvariantCulture);

​

        var enumerable = o as IEnumerable;

        if (enumerable != null)

            return $"[{enumerable.Cast<object>().Select(Dump).Join(", ")}]";

​

        return $"{{{o.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance).Select(p => $"{p.Name} = {Dump(p.GetValue(o))}").Join(", ")}}}";

    }

}

​

public class Person

{

    public string FirstName { get; set; }

    public string LastName { get; set; }

    public DateTime BirthDate { get; set; }

    public List<string> PhoneNumbers { get; set; }

}