help with sockets in C#

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C#

networking

sockets

hi everyone!
I want to create a tcp client using System.Net.Sockets.Socket class to make a new connection to a remote host

Socket _client = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

try
{
    _client.Connect(IPAddress.Parse("193.89.90.21"), 9000);
}
catch(SocketException)
{
    //blah - blah -blah--
}

I want to figure out how to set the connection timeout and what time should elapsed to notify that there is no chance to connect???
How to use Socket.Poll() method properly to test whether the connection could be ever established???