private void SendEnumRecentUser()
{
Task.Run(() =>
{
Dictionary <string, int> result = new Dictionary <string, int>();
foreach (var record in recorder.GetHistoryList())
{
result[record.userName] = (record.id);
}
StringBuilder sb = new StringBuilder();
foreach (var pair in result)
{
sb.AppendFormat("{0}->{1} || ", pair.Value, pair.Key);
}
SendResponseMessage(sb.ToString());
});
}