static void EnsureVersionInfo()
{
if (name != null)
{
return;
}
var osVersion = Environment.OSVersion;
var osVersionInfo = new OSVERSIONINFOEX
{
dwOSVersionInfoSize = Marshal.SizeOf(typeof(OSVERSIONINFOEX))
};
if (Win32API.GetVersionEx(ref osVersionInfo))
{
name = GetOSName(osVersion, osVersionInfo) ?? "Unknown";
servicePack = osVersionInfo.szCSDVersion ?? string.Empty;
}
else
{
name = "Unknown";
servicePack = string.Empty;
}
}
public static extern bool GetVersionEx(ref OSVERSIONINFOEX osVersionInfo);
static string GetOSName(OperatingSystem osVersion, OSVERSIONINFOEX osVersionInfo)
{
var majorVersion = osVersion.Version.Major;
var minorVersion = osVersion.Version.Minor;
switch (osVersion.Platform)
{
case PlatformID.Win32S: return "Windows 3.1";
case PlatformID.WinCE: return "Windows CE";
case PlatformID.Win32Windows:
{
if (majorVersion == 4)
{
var csdVersion = osVersionInfo.szCSDVersion;
switch (minorVersion)
{
case 0:
return csdVersion == "B" || csdVersion == "C"
? "Windows 95 OSR2"
: "Windows 95";
case 10:
return csdVersion == "A"
? "Windows 98 Second Edition"
: "Windows 98";
case 90:
return "Windows Me";
}
}
break;
}
case PlatformID.Win32NT:
{
var productType = osVersionInfo.wProductType;
switch (majorVersion)
{
case 3:
return "Windows NT 3.51";
case 4:
switch (productType)
{
case 1: return "Windows NT 4.0";
case 3: return "Windows NT 4.0 Server";
}
break;
case 5:
switch (minorVersion)
{
case 0: return "Windows 2000";
case 1: return "Windows XP";
case 2: return "Windows Server 2003";
}
break;
case 6:
switch (minorVersion)
{
case 0:
switch (productType)
{
case 1: return "Windows Vista";
case 3: return "Windows Server 2008";
}
break;
case 1:
switch (productType)
{
case 1: return "Windows 7";
case 3: return "Windows Server 2008 R2";
}
break;
}
break;
}
break;
}
}
return null;
}
static void EnsureVersionInfo()
{
if (name != null) return;
var osVersion = Environment.OSVersion;
var osVersionInfo = new OSVERSIONINFOEX
{
dwOSVersionInfoSize = Marshal.SizeOf(typeof(OSVERSIONINFOEX))
};
if (Win32API.GetVersionEx(ref osVersionInfo))
{
name = GetOSName(osVersion, osVersionInfo) ?? "Unknown";
servicePack = osVersionInfo.szCSDVersion ?? string.Empty;
}
else
{
name = "Unknown";
servicePack = string.Empty;
}
}
public static extern bool GetVersionEx(ref OSVERSIONINFOEX osVersionInfo);
static string GetOSName(OperatingSystem osVersion, OSVERSIONINFOEX osVersionInfo)
{
var majorVersion = osVersion.Version.Major;
var minorVersion = osVersion.Version.Minor;
switch (osVersion.Platform)
{
case PlatformID.Win32S: return("Windows 3.1");
case PlatformID.WinCE: return("Windows CE");
case PlatformID.Win32Windows:
{
if (majorVersion == 4)
{
var csdVersion = osVersionInfo.szCSDVersion;
switch (minorVersion)
{
case 0:
return(csdVersion == "B" || csdVersion == "C"
? "Windows 95 OSR2"
: "Windows 95");
case 10:
return(csdVersion == "A"
? "Windows 98 Second Edition"
: "Windows 98");
case 90:
return("Windows Me");
}
}
break;
}
case PlatformID.Win32NT:
{
var productType = osVersionInfo.wProductType;
switch (majorVersion)
{
case 3:
return("Windows NT 3.51");
case 4:
switch (productType)
{
case 1: return("Windows NT 4.0");
case 3: return("Windows NT 4.0 Server");
}
break;
case 5:
switch (minorVersion)
{
case 0: return("Windows 2000");
case 1: return("Windows XP");
case 2: return("Windows Server 2003");
}
break;
case 6:
switch (minorVersion)
{
case 0:
switch (productType)
{
case 1: return("Windows Vista");
case 3: return("Windows Server 2008");
}
break;
case 1:
switch (productType)
{
case 1: return("Windows 7");
case 3: return("Windows Server 2008 R2");
}
break;
}
break;
}
break;
}
}
return(null);
}
