In C#, how can I know programmatically if the Operating system is x64 or x86
I found this API method on the internet, but it doesn't work
[DllImport("kernel32.dll")]
public static extern bool IsWow64Process(System.IntPtr hProcess, out bool lpSystemInfo);
public static bool IsWow64Process1
{
get
{
bool retVal = false;
开发者_运维百科 IsWow64Process(System.Diagnostics.Process.GetCurrentProcess().Handle, out retVal);
return retVal;
}
}
Thanks in advance.
In .NET 4.0 you can use the new Environment.Is64BitOperatingSystem property.
And this is how it's impemented
public static bool Is64BitOperatingSystem
{
[SecuritySafeCritical]
get
{
bool flag;
return ((Win32Native.DoesWin32MethodExist("kernel32.dll", "IsWow64Process") && Win32Native.IsWow64Process(Win32Native.GetCurrentProcess(), out flag)) && flag);
}
}
Use reflector or similar to see exactly how it works.
bool x86 = IntPtr.Size == 4;
If you build against AnyCPU, and you run on a 64-bit system, it will run on the 64-bit version of the framework. On a 32-bit system, it will run on the 32-bit version of the framework. You can use this to its advantage by simply checking the IntPtr.Size
property. If the Size
= 4, you are running on 32-bit, Size
= 8, you are running on 64-bit.
Have a look at this:
http://msdn.microsoft.com/en-us/library/system.environment_members.aspx
I think you are looking for System.Environment.OSVersion
The following is from this answer, so don't upvote me for it :)
if (8 == IntPtr.Size
|| (!string.IsNullOrEmpty(Environment.GetEnvironmentVariable("PROCESSOR_ARCHITEW6432"))))
{
// x64
}
else
{
// x86
}
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