Floating Point Representation [C#]

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

namespace ConsoleApplication
{
    class Program
    {
        static void Main(string[] args)
        {
            unsafe
            {
                float _f1, _f2;
                _f1 = -130.05f;
                _f2 = 130.05f;
                float* _f1Addr = &_f1;
                float* _f2Addr = &_f2;
                byte[] _f1Val = new byte[4];
                byte[] _f2Val = new byte[4];
                Marshal.Copy((IntPtr)(float*)&_f1, _f1Val, 0, _f1Val.Length);
                Marshal.Copy((IntPtr)(float*)&_f2, _f2Val, 0, _f2Val.Length);
                String _f1Str = "", _f2Str = "";
                for (int i = _f1Val.Length-1; i >= 0;i-- )
                    _f1Str += Convert.ToString(_f1Val[i], 2).PadLeft(8, '0');
                for (int i = _f2Val.Length - 1; i >= 0; i--)
                    _f2Str += Convert.ToString(_f2Val[i], 2).PadLeft(8, '0');

                System.Console.WriteLine("The value of _f1 is {0}",_f1);
                System.Console.WriteLine("The address of _f1 is {0:X08}", (int)&_f1);
                System.Console.WriteLine("The bin of _f1 is {0}\n", _f1Str);
                System.Console.WriteLine("The value of _f2 is {0}", _f2);
                System.Console.WriteLine("The address of _f2 is {0:X08}", (int)&_f2);
                System.Console.WriteLine("The bin of _f2 is {0}", _f2Str);
                System.Console.ReadKey();
            }
        }
    }
}