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I have a list of Socket object. Sometimes due to network issue one of the socket get disposed and when I try to access the list I get the error Can Not access disposed object.

How can I remove disposed object from the list?
Of course you cannot use disposed object. But this is not a good question: you did not provide any essential detail. What list? Anyway, all list objects have methods like Remove, RemoveAt. Use it.

Many classes which implement IDisposable also offer events: Disposing / Disposed. If the classes you use here do not provide them, override their Dispose method and add such an event.
Then register the event, and remove the item from the lis when the event was raised.
Try using Dictionary<Endpoint, Socket> instead of List<socket>.
Then, we have a socket list like this:

Dictionary<EndPoint, Socket> activeSocketList = new Dictionary<EndPoint, Socket>();

We can also Add or Remove entity as using the List:

Socket socket = new Socket(IPAddress.Any.AddressFamily, SocketType.Stream, ProtocolType.IP);
EndPoint ep = new IPEndPoint(IPAddress.Parse(""), 8080);

activeSocketList.Add(socket.LocalEndPoint, socket);

Also we can use socket.RemoteEndPoint as the Key for "activeSocketList" after socket has connected.

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