How to judge 32-bit OS and 64-bit OS

There are many ways to determine whether the system is 64-bit.

For C #, WMI is a simple method. We can use the addresswidth attribute in the win32_processor class to indicate the system bit width. The addresswidth value is affected by the CPU and operating system.

The specific values are shown in the following table:

	32bit OS	64bit OS
32bit CPU	Addresswidth = 32	N/
64-bit CPU	Addresswidth = 32	Addresswidth = 64

You can use the following C # code to obtain the addresswidth value.
(Note that you need to add reference system. Management)

Public static string detect3264 ()
{
Connectionoptions oconn = new connectionoptions ();
System. Management. managementscope OMS = new system. Management. managementscope ("// localhost", oconn );
System. Management. objectquery oquery = new system. Management. objectquery ("select addresswidth from win32_processor ");
Managementobjectsearcher osearcher = new managementobjectsearcher (OMS, oquery );
Managementobjectcollection oreturncollection = osearcher. Get ();
String addresswidth = NULL;

Foreach (managementobject oreturn in oreturncollection)
{
Addresswidth = oreturn ["addresswidth"]. tostring ();
}

Return addresswidth;
}