using System;

public class Program

{

    public static void Main()

    {

        decimal result = TruncateDecimal(123.4567, 2);

        Console.WriteLine(result);

    }

    public static decimal TruncateDecimal(double value, int precision)

    {

        decimal step = (decimal)Math.Pow(10, precision);

        int tmp = (int)Math.Truncate(step * (decimal)value);

        return tmp / step;

    }

}