using System;

using System.Globalization;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        Console.WriteLine(prepareDecimal("01.01"));

    }

    public static decimal prepareDecimal(string value)

    {

        if (value == null)

        {

            return 0;

        }

​

        if (value.Contains(" "))

        {

            value = value.Split(' ')[0];

        }

​

        CultureInfo culture = new CultureInfo("pt-BR");

        NumberStyles style = NumberStyles.Number | NumberStyles.AllowDecimalPoint;

​

        if (decimal.TryParse(value, style, culture, out decimal result))

        {

            return result;

        }

​

​

        if (value.Split('.').Length - 1 > 1)

        {

            int lastIndex = value.LastIndexOf('.');

            if (lastIndex != -1)

            {

                value = value.Remove(lastIndex, 1).Insert(lastIndex, ",");

            }

        }

        else if (value.Split('.').Length - 1 == 1 && value.Split('.')[1].Length == 2 && !value.Contains(","))

        {

            value = value.Replace('.', ',');

        }

        else if (value.Split(',').Length - 1 > 1)

        {

            int lastIndex = value.LastIndexOf(',');

            if (lastIndex != -1)

            {

                value = value.Replace(',', '.');

                value = value.Remove(lastIndex, 1).Insert(lastIndex, ",");

            }

        }

​

        CultureInfo newCulture = new CultureInfo("pt-BR");

        NumberStyles newStyle = NumberStyles.Number | NumberStyles.AllowDecimalPoint;

​

        if (decimal.TryParse(value, newStyle, newCulture, out decimal newResult))

        {

            return newResult;

        }

        else

        {

            return 0;

        }

    }

}