public static extern bool GetVersionEx(ref OSVERSIONINFOEX osvi);
/// <summary>
/// This retrieves the operating system
/// </summary>
/// <returns></returns>
private static OperatingSystem DetermineOperatingSystem()
{
int majorVersion = Environment.OSVersion.Version.Major;
int minorVersion = Environment.OSVersion.Version.Minor;
bool isServer = false;
OSVERSIONINFOEX osvi = new OSVERSIONINFOEX();
// If browser hosted, then do the best we can. Assume workstation.
osvi.dwOSVersionInfoSize = Marshal.SizeOf(osvi);
if (NativeMethods.GetVersionEx(ref osvi))
{
isServer = osvi.wProductType != 0x1;
}
// Begin OS detection
OperatingSystem ver = OperatingSystem.Unknown;
if (majorVersion == 5)
{
switch (minorVersion)
{
// 5.0 = Windows 2000
case 0:
ver = OperatingSystem.Windows2000;
break;
// 5.1 = Windows XP
case 1:
ver = OperatingSystem.WindowsXP;
break;
// 5.2 = Windows Server 2003, Windows Server 2003R2 or Windows XP 64-bit
case 2:
ver = OperatingSystem.Windows2003;
// Special case 64-bit Windows XP
if (!isServer)
{
ver = OperatingSystem.WindowsXP;
}
else
{
if (NativeMethods.GetSystemMetrics(SM_SERVERR2))
{
ver = OperatingSystem.Windows2003R2;
}
}
break;
}
}
else if (majorVersion == 6)
{
switch (minorVersion)
{
// 6.0 = Windows Vista, Windows Server 2008
case 0:
ver = (isServer) ? OperatingSystem.Windows2008 : OperatingSystem.WindowsVista;
break;
// 6.1 = Windows 7, Windows Server 2008 R2
case 1:
ver = (isServer) ? OperatingSystem.Windows2008R2 : OperatingSystem.Windows7;
break;
// 6.2 = Windows 8, Windows Server 2012
case 2:
ver = (isServer) ? OperatingSystem.Windows2012 : OperatingSystem.Windows8;
break;
}
}
return(ver);
}
