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有没有“好”的方法可以做到这一点，或者我应该尝试打开连接，如果失败，我会假设设备没有被激活。
我使用 OpenNETCF.Net.Bluetooth DLL，如果你有，那么你可以简单地检查一下
OpenNETCF.Net.Bluetooth.BluetoothRadio.PrimaryRadio.Mode