The client always maintains a connection with the server.
客户端总是维护与服务器的连接。
Then, you use an AsyncCallback object to actually do something with the server response.
然后，使用AsyncCallback对象对服务器响应执行一些实际操作。
A connection with the server could not be established.
不可与服务器建立连接。
In a modal application, when the application is online it communicates with the server.
在一个模态应用程序中，当应用程序是在线的，它与服务器进行通信。
With the server-side set up, your next step is to establish the client.
设置了服务器端后，下一步是建立客户机。
With the server-side set up, your next step is to establish the client.
设置了服务器端后，下一步是建立客户机。
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