This version of Unity is unsupported.
Method group is Obsolete

NetworkConnection.isConnected

Obsolete The high level API classes are deprecated and will be removed in the future. public bool isConnected;

Description

True if the connection is connected to a remote end-point.

This applies to NetworkServer and NetworkClient connections. When not connected, the hostID will be -1. When connected, the hostID will be a positive integer.