using System;

using System.Net;

using System.Net.Http;

using System.Net.Http.Json;

using System.Net.Mime;

using System.Text;

using System.Text.Json.Serialization;

using System.Globalization;

using Nullable.Extensions;

public class Program

{

    public static void Main()

    {

        var amount = 125.99m;

       Console.WriteLine(amount.ToCentime());

    }

}

​

​

public static class AmountConverterBasic

{

​

    public static long? ToCentime(this decimal? amountInEuro)

    {

        if (!amountInEuro.HasValue)

        {

            return null;

        }

​

        return ToCentime(amountInEuro.Value);

    }

    public static long ToCentime(this decimal amountInEuro) => (long)(amountInEuro * 100);

​

}

​

​

public static class AmountConverterNullable

{

    public static long? ToCentime2(this decimal? amountInEuro) => 

        amountInEuro.Map(x => (long)(x * 100));

}