windows ble5 无法获取蓝牙设备

System.ArgumentException: 实例方法的委托不能具有空“this”。
   在 System.MulticastDelegate.ThrowNullThisInDelegateToInstance()
   在 System.MulticastDelegate.CtorClosed(Object target, IntPtr methodPtr)
   在 ClassLibrary1.BluetoothLECode.d__47.MoveNext()

设备是null,将Microsoft Visual C++ 2015-2022 Redistributable (x64) - 14.38.33130卸载解决
windows已经存在2012,2015-19的VC_redist.x64
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