private async Task StartHostAsyncBackground(RHostStartupInfo startupInfo, IRSessionCallback callback, IBinaryAsyncLockToken lockToken, int timeout)
{
await TaskUtilities.SwitchToBackgroundThread();
_callback = callback;
_startupInfo = startupInfo;
RHost host;
try {
host = await BrokerClient.ConnectAsync(startupInfo.Name, this, startupInfo.RHostCommandLineArguments, timeout);
} catch (OperationCanceledException ex) {
_initializationTcs.TrySetCanceled(ex);
lockToken.Reset();
throw;
} catch (Exception ex) {
_initializationTcs.TrySetException(ex);
lockToken.Reset();
throw;
}
await StartHostAsyncBackground(host, lockToken);
}
