public Privilege(string privilegeName)
{
if (privilegeName == null)
{
throw new ArgumentNullException("privilegeName");
}
this.luid = LuidFromPrivilege(privilegeName);
}
private static Win32Native.LUID LuidFromPrivilege(string privilege)
{
Win32Native.LUID luid;
luid.LowPart = 0;
luid.HighPart = 0;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
privilegeLock.AcquireReaderLock(-1);
if (luids.Contains(privilege))
{
luid = (Win32Native.LUID) luids[privilege];
privilegeLock.ReleaseReaderLock();
return luid;
}
privilegeLock.ReleaseReaderLock();
if (!Win32Native.LookupPrivilegeValue(null, privilege, ref luid))
{
switch (Marshal.GetLastWin32Error())
{
case 8:
throw new OutOfMemoryException();
case 5:
throw new UnauthorizedAccessException();
case 0x521:
throw new ArgumentException(Environment.GetResourceString("Argument_InvalidPrivilegeName", new object[] { privilege }));
}
throw new InvalidOperationException();
}
privilegeLock.AcquireWriterLock(-1);
}
finally
{
if (privilegeLock.IsReaderLockHeld)
{
privilegeLock.ReleaseReaderLock();
}
if (privilegeLock.IsWriterLockHeld)
{
if (!luids.Contains(privilege))
{
luids[privilege] = luid;
privileges[luid] = privilege;
}
privilegeLock.ReleaseWriterLock();
}
}
return luid;
}