internal WindowsImpersonationContext(IntPtr token)
{
if (token == ZeroHandle)
{
m_userToken = ZeroHandle;
}
else
{
m_userToken = WindowsIdentity._DuplicateHandle(token, false);
if (m_userToken == ZeroHandle)
{
throw new ArgumentException(Environment.GetResourceString("Argument_InvalidToken"));
}
}
}