当conversionType为十进制且输入为"40.00"时,如何使用Convert.ChangeType()

using System;

class Program
{
    static void Main()
    {
        string input = "40.00";
        decimal output;

        try
        {
            output = (decimal)Convert.ChangeType(input, typeof(decimal));
            Console.WriteLine("Converted value: " + output);
        }
        catch (FormatException)
        {
            Console.WriteLine("Invalid format.");
        }
    }
}