HttpRequestException: 傳送要求時發生錯誤。
StackTrace:
   於 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   於 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   於 DynamicClass.<API_SearchRole>d__dd.MoveNext()
--- 先前擲回例外狀況之位置中的堆疊追蹤結尾 ---
   於 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   於 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   於 DynamicClass.<Tab_bar_SelectionChanged>d__2b.MoveNext()
--- 先前擲回例外狀況之位置中的堆疊追蹤結尾 ---
   於 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   於 System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   於 System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

WebException: 無法連接至遠端伺服器
--Status: ConnectFailure
StackTrace:
   於 System.Net.HttpWebRequest.EndGetRequestStream(IAsyncResult asyncResult, TransportContext& context)
   於 System.Net.Http.HttpClientHandler.GetRequestStreamCallback(IAsyncResult ar)

SocketException: 無法連線，因為目標電腦拒絕連線。 123.207.77.50:25678
--ErrorCode: 10061
--Message: 無法連線，因為目標電腦拒絕連線。 123.207.77.50:25678
--SocketErrorCode: ConnectionRefused
StackTrace:
   於 System.Net.Sockets.Socket.InternalEndConnect(IAsyncResult asyncResult)
   於 System.Net.Sockets.Socket.EndConnect(IAsyncResult asyncResult)
   於 System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception)