C# 判断Windows版本及CPU位数

class
CheckWinVersion

{

int
getOSArchitecture()

{

string
pa = Environment.GetEnvironmentVariable(
"PROCESSOR_ARCHITECTURE"
);

return
((String.IsNullOrEmpty(pa) || String.Compare(pa, 0,
"x86"
, 0, 3,
true
) == 0) ? 32 : 64);

}

string
getOSInfo()

{

//Get Operating system information.

OperatingSystem os = Environment.OSVersion;

//Get version information about the os.

Version vs = os.Version;

//Variable to hold our return value

string
operatingSystem =
""
;

if
(os.Platform == PlatformID.Win32Windows)

{

//This is a pre-NT version of Windows

switch
(vs.Minor)

{

case
0:

operatingSystem = "95"
;

break
;

case
10:

if
(vs.Revision.ToString() ==
"2222A"
)

operatingSystem = "98SE"
;

else

operatingSystem = "98"
;

break
;

case
90:

operatingSystem = "Me"
;

break
;

default
:

break
;

}

}

else

if
(os.Platform == PlatformID.Win32NT)

{

switch
(vs.Major)

{

case
3:

operatingSystem = "NT 3.51"
;

break
;

case
4:

operatingSystem = "NT 4.0"
;

break
;

case
5:

if
(vs.Minor == 0)

operatingSystem = "2000"
;

else

operatingSystem = "XP"
;

break
;

case
6:

if
(vs.Minor == 0)

operatingSystem = "Vista"
;

else

operatingSystem = "7"
;

break
;

default
:

break
;

}

}

//Make sure we actually got something in our OS check

//We don't want to just return " Service Pack 2" or " 32-bit"

//That information is useless without the OS version.

if
(operatingSystem !=
""
)

{

//Got something. Let's prepend "Windows" and get more info.

operatingSystem = "Windows "
+ operatingSystem;

//See if there's a service pack installed.

if
(os.ServicePack !=
""
)

{

//Append it to the OS name. i.e. "Windows XP Service Pack 3"

operatingSystem += " "
+ os.ServicePack;

}

//Append the OS architecture. i.e. "Windows XP Service Pack 3 32-bit"

operatingSystem += " "
+ getOSArchitecture().ToString() +
"-bit"
;

}

//Return the information we've gathered.

return
operatingSystem;

}

}