ObjectDisposedException while connecting ssh

src/Renci.SshNet/Abstractions/SocketAbstraction.cs の Connect(IPEndPoint remoteEndpoint, TimeSpan connectTimeout) から始めます。タイムアウトと破棄に関する ManualResetEvent.Completed コールバックと ManualResetEvent のライフタイムを追跡します。SSH 経由で接続しているときに、接続が破棄の直前に完了する場合も含め、報告された ObjectDisposedException が発生しなくなれば完了です。

sometimes I get an error while using ssh connection, it is the cause of crashed app, with the following log messages:

2019-09-16 10:04:22.710 OneLink.iOS[307:17928]
Unhandled Exception:
System.ObjectDisposedException: Safe handle has been closed
at System.Runtime.InteropServices.SafeHandle.DangerousAddRef (System.Boolean& success) [0x0001c] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.14.0.114/src/Xamarin.iOS/mcs/class/corlib/System.Runtime.InteropServices/SafeHandle.cs:125
at System.Threading.NativeEventCalls.SetEvent (Microsoft.Win32.SafeHandles.SafeWaitHandle handle) [0x00002] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.14.0.114/src/Xamarin.iOS/mcs/class/corlib/System.Threading/NativeEventCalls.cs:61
at System.Threading.EventWaitHandle.Set () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.14.0.114/src/Xamarin.iOS/mcs/class/referencesource/mscorlib/system/threading/eventwaithandle.cs:319
at Renci.SshNet.Abstractions.SocketAbstraction.ConnectCompleted (System.Object sender, System.Net.Sockets.SocketAsyncEventArgs e) [0x0000f] in :0

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I checked your codes, and I think that the problem in the function
public static Socket Connect(IPEndPoint remoteEndpoint, TimeSpan connectTimeout)
in file src/Renci.SshNet/Abstractions/SocketAbstraction.cs.
Maybe we must remove Completed callback function before disposing of ManualResetEvent.

Can you help me to check this issue?

Thanks so much!