C# 7.0 Switch Case (Pattern Matching)

switch (_commTransport)
{
    case TerminalDebugClient _:
        ((TerminalDebugClient)_commTransport).HostValidation += OnHostValidation;
        break;
    case SshDebugClient _:
        ((SshDebugClient)_commTransport).HostValidation += OnHostValidation;
        break;
}