Владимир Коротенко

using System;
					
public class Program
{
	public static void Main()
	{
		try{
		  GetImage(2);
		}
		catch(ArgumentException e){
		  Console.WriteLine( int.Parse(e.Message));
		}
	}
	public static string GetImage(int index){
	  if(index == 1){ return "/img/1";}
	  throw new ArgumentException("5");
	}
}

using System;
					
public class Program
{
	public static void Main()
	{
		Object r = GetImage(1);
		Check(r);
		 r = GetImage(2);
		Check(r);
	}
	public static void Check(Object o){
	   if(o is String) Console.WriteLine("string");
	   if(o is int) Console.WriteLine("int");
		else
		Console.WriteLine(o.GetType());
	}
	public static Object GetImage(int index){
	  if(index == 1){ return "/img/1";}
	  return 5;
	}
}

using System.Text.Json;

namespace SerializeBasic
{
    public class WeatherForecast
    {
        public DateTimeOffset Date { get; set; }
        public int TemperatureCelsius { get; set; }
        public string? Summary { get; set; }
    }

    public class Program
    {
        public static void Main()
        {
            var weatherForecast = new WeatherForecast
            {
                Date = DateTime.Parse("2019-08-01"),
                TemperatureCelsius = 25,
                Summary = "Hot"
            };
            var list = new List<WeatherForecast>();
            list.Add(weatherForecast);
            string jsonString = JsonSerializer.Serialize(list.ToArray());

            Console.WriteLine(jsonString);
        }
    }
}