Check Os is 32bit or 64bit in C#.net

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Hi,
How to check Os is 32bit or 64bit in C#.net?It is an windows application?Please how to achieve this task.

Posted 29-Nov-11 18:25pm

naraayanan

Updated 29-Aug-17 4:37am

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uspatel · Answer 1 · 2011-11-29T18:33:00

use System.Environment.GetEnvironmentVariable() method

C#

Console.WriteLine(System.Environment.GetEnvironmentVariable("PROCESSOR_ARCHITECTURE").ToString());

C#

and you can use as

 if (Environment.Is64BitOperatingSystem) 
   {
     return Environment.GetEnvironmentVariable("SysWOW64"); 
   }
  else
   {
      return Environment.GetEnvironmentVariable("system32");       
   }

koolprasad2003 · Answer 2 · 2011-11-29T18:37:00

it is very simple.
You can check using IntPtr size. IntPtr sixe is 4 for 32 BIT OS and 8 for 64 BIT OS

C#

if (IntPtr.Size == 8)
// 64Bit
else
// 32bit

OR

Using intPtr and process we can search is OS64 bit. use the following code

C#

[DllImport("kernel32.dll", SetLastError = true, CallingConvention = CallingConvention.Winapi)]
2 [return: MarshalAs(UnmanagedType.Bool)]
3 public static extern bool IsWow64Process([In] IntPtr hProcess, [Out] out bool lpSystemInfo);
4
5 public bool Is64Bit()
6 {
7     bool retVal;
8
9     IsWow64Process(Process.GetCurrentProcess().Handle, out retVal);
10
11     return retVal;

**JF2015** · Answer 3 · 2011-11-29T18:28:00

Solution 1

See this Tip/Trick for several solutions:
32-Bit or 64-bit OS ??[^]

Posted 29-Nov-11 18:28pm

JF2015

Comments

naraayanan 5-Dec-11 10:07am

Thanks

Shree · Answer 4 · 2019-07-18T18:42:00

Solution 6

For anyone searching for a solution now,

Environment.Is64BitOperatingSystem

returns true for 64 bit systems and false for 32 bit.

Posted 18-Jul-19 18:42pm

Shree

Updated 18-Jul-19 19:47pm

Check Os is 32bit or 64bit in C#.net

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