# C1.Zip.C1ZipFile.IsZipFile

## Content

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



<h1 id="C1_Zip_C1ZipFile_IsZipFile_" data-uid="C1.Zip.C1ZipFile.IsZipFile*">IsZipFile Method
</h1>
<div class="markdown level0 summary"></div>
<div class="markdown level0 conceptual"></div>



<a id="C1_Zip_C1ZipFile_IsZipFile_" data-uid="C1.Zip.C1ZipFile.IsZipFile*"></a>
<h4 id="C1_Zip_C1ZipFile_IsZipFile_System_String_" data-uid="C1.Zip.C1ZipFile.IsZipFile(System.String)">IsZipFile(string)</h4>
<div class="markdown level1 summary"><p>Tests whether a file is a valid zip file.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
<div class="codewrapper">
  <pre><code class="lang-csharp hljs">public static bool IsZipFile(string fileName)</code></pre>
</div>
<div class="codewrapper">
  <pre><code class="lang-vbnet hljs">Public Shared Function IsZipFile(fileName As String) As Boolean</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.string">string</a></td>
      <td><span class="parametername">fileName</span></td>
      <td><p>Name of the file to test.</p>
</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.boolean">bool</a></td>
      <td><p>True if the file exists and is a valid zip file, false otherwise.</p>
</td>
    </tr>
  </tbody>
</table>


<a id="C1_Zip_C1ZipFile_IsZipFile_" data-uid="C1.Zip.C1ZipFile.IsZipFile*"></a>
<h4 id="C1_Zip_C1ZipFile_IsZipFile_System_IO_Stream_" data-uid="C1.Zip.C1ZipFile.IsZipFile(System.IO.Stream)">IsZipFile(Stream)</h4>
<div class="markdown level1 summary"><p>Tests whether a stream contains a valid zip file.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
<div class="codewrapper">
  <pre><code class="lang-csharp hljs">public static bool IsZipFile(Stream stream)</code></pre>
</div>
<div class="codewrapper">
  <pre><code class="lang-vbnet hljs">Public Shared Function IsZipFile(stream As Stream) As Boolean</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.io.stream">Stream</a></td>
      <td><span class="parametername">stream</span></td>
      <td><p><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.io.stream">Stream</a> to test.</p>
</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.boolean">bool</a></td>
      <td><p>True if <code class="paramref">stream</code> contains a valid zip file, false otherwise.</p>
</td>
    </tr>
  </tbody>
</table>
</div>