using System;

using System.ComponentModel;

public class Program

{

    class A{

    }

    class B:A{

    }

    public static void Main()

    {

        Console.WriteLine($"Result: {Test<int>(int.MaxValue)}");

        Console.WriteLine($"Result: {Test<DateTime>("2019--12-12")}");

        Console.WriteLine($"Result: {Test<decimal>("0,02")}");

        Console.WriteLine($"Result: {Test<decimal>("0.02")}");

    }

    static T Test<T>(object val){

        TypeConverter tc = TypeDescriptor.GetConverter(typeof(T));

        bool valid = tc.IsValid(val);

        Console.WriteLine($"Valid: {valid}, value: {val}");

        if (valid){

            return (T)tc.ConvertFrom(val);

        }else{

            return default;

        }

    }

}