Xamarin.iOS Application crash - Mono SslStream throws an exception in Dispose()

Sometimes when changing wifi/4G on iPhone app crashes because in WebSocket.cs in releaseClientResources is called _stream.Dispose(); and Dispose throws an Exception.

Swallowing exception helped. I don't know how to handle it better.

Unable to write data to the transport connection: The socket has been shut down. (System.IO.IOException)
at System.Net.Sockets.NetworkStream.Write (System.Byte[] buffer, System.Int32 offset, System.Int32 size) [0x000e8] in /Library/Frameworks/Xamarin.iOS.framework/Versions/10.4.0.121/src/mono/mcs/class/referencesource/System/net/System/Net/Sockets/NetworkStream.cs:602
at Mono.Net.Security.MobileAuthenticatedStream.InnerFlush () [0x00011] in /Library/Frameworks/Xamarin.iOS.framework/Versions/10.4.0.121/src/mono/mcs/class/System/Mono.Net.Security/MobileAuthenticatedStream.cs:562
at Mono.Net.Security.MobileAuthenticatedStream.InnerWrite () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/10.4.0.121/src/mono/mcs/class/System/Mono.Net.Security/MobileAuthenticatedStream.cs:556
at Mono.Net.Security.AsyncProtocolRequest.ProcessOperation (Mono.Net.Security.AsyncOperationStatus status) [0x0006b] in /Library/Frameworks/Xamarin.iOS.framework/Versions/10.4.0.121/src/mono/mcs/class/System/Mono.Net.Security/AsyncProtocolRequest.cs:267
at Mono.Net.Security.AsyncProtocolRequest.ProcessOperation () [0x0000d] in /Library/Frameworks/Xamarin.iOS.framework/Versions/10.4.0.121/src/mono/mcs/class/System/Mono.Net.Security/AsyncProtocolRequest.cs:218
at Mono.Net.Security.AsyncProtocolRequest.StartOperation () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/10.4.0.121/src/mono/mcs/class/System/Mono.Net.Security/AsyncProtocolRequest.cs:199
--- inner exception ---
The socket has been shut down (System.Net.Sockets.SocketException)
at System.Net.Sockets.Socket.Send (System.Byte[] buffer, System.Int32 offset, System.Int32 size, System.Net.Sockets.SocketFlags socketFlags) [0x0002a] in /Library/Frameworks/Xamarin.iOS.framework/Versions/10.4.0.121/src/mono/mcs/class/System/System.Net.Sockets/Socket.cs:2383
at System.Net.Sockets.NetworkStream.Write (System.Byte[] buffer, System.Int32 offset, System.Int32 size) [0x000b4] in /Library/Frameworks/Xamarin.iOS.framework/Versions/10.4.0.121/src/mono/mcs/class/referencesource/System/net/System/Net/Sockets/NetworkStream.cs:591
...
WebSocket.cs
releaseClientResources

Start in WebSocket.cs at releaseClientResources and trace the _stream.Dispose() path alongside the reported MobileAuthenticatedStream stack trace. Reproduce a Wi-Fi/4G transition on the iPhone, determine the expected disposal behavior for a shut-down socket, and verify the application no longer crashes during that transition.