protected virtual void Dispose(bool disposing)
{
// Note there are three interesting states here:
// 1) CreateFile failed, _handle contains an invalid handle
// 2) We called Dispose already, _handle is closed.
// 3) _handle is null, due to an async exception before
// calling CreateFile. Note that the finalizer runs
// if the constructor fails.
if (_handle != null && !_handle.IsInvalid)
{
// Free the handle
_handle.Dispose();
}
// SafeHandle records the fact that we've called Dispose.
}
protected virtual void Dispose(bool disposing)
{
//Note there are three interesting states here:
//值得注意的是，这有三种状态
//1).CreateFile failed,_handle contains an invalid handle.
//1）CreateFile失败，_handle包含无效句柄
//2).We called Dispose already, _handle is closed.
//2)我们已经调用了Dispose，句柄已关闭
//3)._handle is null,due to an async exception before calling CreateFile.
//3）_handle为空，因为在调用CreateFile之前发生了异步异常
//Note that the finalizer runs if the constructor fails.
//注意，如果构造函数失败，则终结器将运行
if (_handle != null && !_handle.IsInvalid)
{
//Free the handle
//释放句柄
_handle.Dispose();
}
//SafeHandle records the fact that we've called Dispose.
//SafeHandle记录了我们调用Dispose的事实
}