using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace TestStringToNum
{
class Program
    {
static void Main(string[] args)
        {
            String str = "15.23";
int i = 2;
float f = 1.2f; 
            Double du = 0.33;

            Type tDouble = du.GetType();
            Type tInt = i.GetType();
            Type tFloat = f.GetType();

try
            {
                du = Double.Parse(str);
            }
catch (Exception e) 
            {
                Console.WriteLine(e.Message.ToString());
            }
try
            {
                i = int.Parse(str);
            }
catch (Exception e) 
            {
                Console.WriteLine(e.Message.ToString());
            }
try 
            {
                f = float.Parse(str);
            }
catch(Exception e)
            {
                Console.WriteLine(e.Message.ToString());
            }
        }
    }
}