ost_readFileCore_member_1_" data-uid="grammarkdown!CoreAsyncHost#readFileCore:member(1)">readFileCore(file, cancelToken)</h4>
  <div class="markdown level1 summary"><p>When overridden in a derived class, reads a file from the host.</p>
</div>
  <div class="markdown level1 conceptual"></div>
  <h5 class="decalaration">Declaration</h5>
  
  <div class="codewrapper">
    <pre><code class="lang-typeScript hljs">/** @virtual */
protected readFileCore(file: string, cancelToken?: CancelToken): Promise&lt;str