# C1.AdoNet.QuickBooksOnline.C1QuickBooksOnlineConnection.OpenAsync

## Content

<div class="doc-site-dotnet-api-container">



<h1 id="C1_AdoNet_QuickBooksOnline_C1QuickBooksOnlineConnection_OpenAsync_" data-uid="C1.AdoNet.QuickBooksOnline.C1QuickBooksOnlineConnection.OpenAsync*">OpenAsync Method
</h1>
<div class="markdown level0 summary"></div>
<div class="markdown level0 conceptual"></div>



<a id="C1_AdoNet_QuickBooksOnline_C1QuickBooksOnlineConnection_OpenAsync_" data-uid="C1.AdoNet.QuickBooksOnline.C1QuickBooksOnlineConnection.OpenAsync*"></a>
<h4 id="C1_AdoNet_QuickBooksOnline_C1QuickBooksOnlineConnection_OpenAsync_System_Threading_CancellationToken_" data-uid="C1.AdoNet.QuickBooksOnline.C1QuickBooksOnlineConnection.OpenAsync(System.Threading.CancellationToken)">OpenAsync(CancellationToken)</h4>
<div class="markdown level1 summary"><p>An asynchronous version of <a class="xref" href="C1.AdoNet.QuickBooksOnline.C1QuickBooksOnlineConnection.Open.html#C1_AdoNet_QuickBooksOnline_C1QuickBooksOnlineConnection_Open">Open()</a> open.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
<div class="codewrapper">
  <pre><code class="lang-csharp hljs">public override Task OpenAsync(CancellationToken cancellationToken)</code></pre>
</div>
<div class="codewrapper">
  <pre><code class="lang-vbnet hljs">Public Overrides Function OpenAsync(cancellationToken As CancellationToken) As Task</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-condensed">
  <thead>
    <tr>
      <th>Type</th>
      <th>Name</th>
      <th>Description</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.threading.cancellationtoken">CancellationToken</a></td>
      <td><span class="parametername">cancellationToken</span></td>
      <td></td>
    </tr>
  </tbody>
</table>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-condensed">
  <thead>
    <tr>
      <th>Type</th>
      <th>Description</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.threading.tasks.task">Task</a></td>
      <td></td>
    </tr>
  </tbody>
</table>
<h5 class="overrides">Overrides</h5>
<div><a class="xref" href="../C1.AdoNet.CSV/C1.DataConnector.AdoNet.C1ConnectionBase.OpenAsync.html#C1_DataConnector_AdoNet_C1ConnectionBase_OpenAsync_System_Threading_CancellationToken_">C1ConnectionBase.OpenAsync(CancellationToken)</a></div>
</div>