[Modify] Polish it
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@ -674,11 +674,18 @@ namespace WebSocketSharp.Net
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public IAsyncResult BeginGetContext (AsyncCallback callback, Object state)
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{
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CheckDisposed ();
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if (_prefixes.Count == 0)
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throw new InvalidOperationException ("The listener has no URI prefix on which listens.");
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if (!_listening)
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throw new InvalidOperationException ("The listener hasn't been started.");
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if (_prefixes.Count == 0) {
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var msg = "The listener has no URI prefix on which listens.";
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throw new InvalidOperationException (msg);
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}
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if (!_listening) {
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var msg = "The listener has not been started.";
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throw new InvalidOperationException (msg);
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}
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return BeginGetContext (new HttpListenerAsyncResult (callback, state));
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}
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