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   | gRPC for .NET </title>
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            <article class="content wrap" id="_content" data-uid="Grpc.Core.Interceptors.ChannelExtensions">
  
  
  <h1 id="Grpc_Core_Interceptors_ChannelExtensions" data-uid="Grpc.Core.Interceptors.ChannelExtensions" class="text-break">Class ChannelExtensions
  </h1>
  <div class="markdown level0 summary"><p>Provides extension methods to make it easy to register interceptors on Channel objects.</p>
</div>
  <div class="markdown level0 conceptual"></div>
  <div class="inheritance">
    <h5>Inheritance</h5>
    <div class="level0"><span class="xref">System.Object</span></div>
    <div class="level1"><span class="xref">ChannelExtensions</span></div>
  </div>
  <h6><strong>Namespace</strong>: <a class="xref" href="Grpc.Core.Interceptors.html">Grpc.Core.Interceptors</a></h6>
  <h6><strong>Assembly</strong>: Grpc.Core.Api.dll</h6>
  <h5 id="Grpc_Core_Interceptors_ChannelExtensions_syntax">Syntax</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static class ChannelExtensions : object</code></pre>
  </div>
  <h3 id="methods">Methods
  </h3>
  <a id="Grpc_Core_Interceptors_ChannelExtensions_Intercept_" data-uid="Grpc.Core.Interceptors.ChannelExtensions.Intercept*"></a>
  <h4 id="Grpc_Core_Interceptors_ChannelExtensions_Intercept_Grpc_Core_ChannelBase_Func_Grpc_Core_Metadata_Grpc_Core_Metadata__" data-uid="Grpc.Core.Interceptors.ChannelExtensions.Intercept(Grpc.Core.ChannelBase,Func{Grpc.Core.Metadata,Grpc.Core.Metadata})">Intercept(ChannelBase, Func&lt;Metadata, Metadata&gt;)</h4>
  <div class="markdown level1 summary"><p>Returns a <a class="xref" href="Grpc.Core.CallInvoker.html">CallInvoker</a> instance that intercepts
the invoker with the given interceptor.</p>
</div>
  <div class="markdown level1 conceptual"></div>
  <h5 class="decalaration">Declaration</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static CallInvoker Intercept(this ChannelBase channel, Func&lt;Metadata, Metadata&gt; interceptor)</code></pre>
  </div>
  <h5 class="parameters">Parameters</h5>
  <table class="table table-bordered table-striped table-condensed">
    <thead>
      <tr>
        <th>Type</th>
        <th>Name</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><a class="xref" href="Grpc.Core.ChannelBase.html">ChannelBase</a></td>
        <td><span class="parametername">channel</span></td>
        <td><p>The channel to intercept.</p>
</td>
      </tr>
      <tr>
        <td><span class="xref">Func</span>&lt;<a class="xref" href="Grpc.Core.Metadata.html">Metadata</a>, <a class="xref" href="Grpc.Core.Metadata.html">Metadata</a>&gt;</td>
        <td><span class="parametername">interceptor</span></td>
        <td><p>An interceptor delegate that takes the request metadata to be sent with an outgoing call
and returns a <a class="xref" href="Grpc.Core.Metadata.html">Metadata</a> instance that will replace the existing
invocation metadata.</p>
</td>
      </tr>
    </tbody>
  </table>
  <h5 class="returns">Returns</h5>
  <table class="table table-bordered table-striped table-condensed">
    <thead>
      <tr>
        <th>Type</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><a class="xref" href="Grpc.Core.CallInvoker.html">CallInvoker</a></td>
        <td></td>
      </tr>
    </tbody>
  </table>
  <h5 id="Grpc_Core_Interceptors_ChannelExtensions_Intercept_Grpc_Core_ChannelBase_Func_Grpc_Core_Metadata_Grpc_Core_Metadata___remarks">Remarks</h5>
  <div class="markdown level1 remarks"><p>Multiple interceptors can be added on top of each other by
building a chain like &quot;channel.Intercept(c).Intercept(b).Intercept(a)&quot;.  Note that
in this case, the last interceptor added will be the first to take control.</p>
</div>
  <a id="Grpc_Core_Interceptors_ChannelExtensions_Intercept_" data-uid="Grpc.Core.Interceptors.ChannelExtensions.Intercept*"></a>
  <h4 id="Grpc_Core_Interceptors_ChannelExtensions_Intercept_Grpc_Core_ChannelBase_Grpc_Core_Interceptors_Interceptor_" data-uid="Grpc.Core.Interceptors.ChannelExtensions.Intercept(Grpc.Core.ChannelBase,Grpc.Core.Interceptors.Interceptor)">Intercept(ChannelBase, Interceptor)</h4>
  <div class="markdown level1 summary"><p>Returns a <a class="xref" href="Grpc.Core.CallInvoker.html">CallInvoker</a> instance that intercepts
the channel with the given interceptor.</p>
</div>
  <div class="markdown level1 conceptual"></div>
  <h5 class="decalaration">Declaration</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static CallInvoker Intercept(this ChannelBase channel, Interceptor interceptor)</code></pre>
  </div>
  <h5 class="parameters">Parameters</h5>
  <table class="table table-bordered table-striped table-condensed">
    <thead>
      <tr>
        <th>Type</th>
        <th>Name</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><a class="xref" href="Grpc.Core.ChannelBase.html">ChannelBase</a></td>
        <td><span class="parametername">channel</span></td>
        <td><p>The channel to intercept.</p>
</td>
      </tr>
      <tr>
        <td><a class="xref" href="Grpc.Core.Interceptors.Interceptor.html">Interceptor</a></td>
        <td><span class="parametername">interceptor</span></td>
        <td><p>The interceptor to intercept the channel with.</p>
</td>
      </tr>
    </tbody>
  </table>
  <h5 class="returns">Returns</h5>
  <table class="table table-bordered table-striped table-condensed">
    <thead>
      <tr>
        <th>Type</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><a class="xref" href="Grpc.Core.CallInvoker.html">CallInvoker</a></td>
        <td></td>
      </tr>
    </tbody>
  </table>
  <h5 id="Grpc_Core_Interceptors_ChannelExtensions_Intercept_Grpc_Core_ChannelBase_Grpc_Core_Interceptors_Interceptor__remarks">Remarks</h5>
  <div class="markdown level1 remarks"><p>Multiple interceptors can be added on top of each other by calling
&quot;channel.Intercept(a, b, c)&quot;.  The order of invocation will be &quot;a&quot;, &quot;b&quot;, and then &quot;c&quot;.
Interceptors can be later added to an existing intercepted channel, effectively
building a chain like &quot;channel.Intercept(c).Intercept(b).Intercept(a)&quot;.  Note that
in this case, the last interceptor added will be the first to take control.</p>
</div>
  <a id="Grpc_Core_Interceptors_ChannelExtensions_Intercept_" data-uid="Grpc.Core.Interceptors.ChannelExtensions.Intercept*"></a>
  <h4 id="Grpc_Core_Interceptors_ChannelExtensions_Intercept_Grpc_Core_ChannelBase_Grpc_Core_Interceptors_Interceptor___" data-uid="Grpc.Core.Interceptors.ChannelExtensions.Intercept(Grpc.Core.ChannelBase,Grpc.Core.Interceptors.Interceptor[])">Intercept(ChannelBase, Interceptor[])</h4>
  <div class="markdown level1 summary"><p>Returns a <a class="xref" href="Grpc.Core.CallInvoker.html">CallInvoker</a> instance that intercepts
the channel with the given interceptors.</p>
</div>
  <div class="markdown level1 conceptual"></div>
  <h5 class="decalaration">Declaration</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static CallInvoker Intercept(this ChannelBase channel, params Interceptor[] interceptors)</code></pre>
  </div>
  <h5 class="parameters">Parameters</h5>
  <table class="table table-bordered table-striped table-condensed">
    <thead>
      <tr>
        <th>Type</th>
        <th>Name</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><a class="xref" href="Grpc.Core.ChannelBase.html">ChannelBase</a></td>
        <td><span class="parametername">channel</span></td>
        <td><p>The channel to intercept.</p>
</td>
      </tr>
      <tr>
        <td><a class="xref" href="Grpc.Core.Interceptors.Interceptor.html">Interceptor</a>[]</td>
        <td><span class="parametername">interceptors</span></td>
        <td><p>An array of interceptors to intercept the channel with.
Control is passed to the interceptors in the order specified.</p>
</td>
      </tr>
    </tbody>
  </table>
  <h5 class="returns">Returns</h5>
  <table class="table table-bordered table-striped table-condensed">
    <thead>
      <tr>
        <th>Type</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><a class="xref" href="Grpc.Core.CallInvoker.html">CallInvoker</a></td>
        <td></td>
      </tr>
    </tbody>
  </table>
  <h5 id="Grpc_Core_Interceptors_ChannelExtensions_Intercept_Grpc_Core_ChannelBase_Grpc_Core_Interceptors_Interceptor____remarks">Remarks</h5>
  <div class="markdown level1 remarks"><p>Multiple interceptors can be added on top of each other by calling
&quot;channel.Intercept(a, b, c)&quot;.  The order of invocation will be &quot;a&quot;, &quot;b&quot;, and then &quot;c&quot;.
Interceptors can be later added to an existing intercepted channel, effectively
building a chain like &quot;channel.Intercept(c).Intercept(b).Intercept(a)&quot;.  Note that
in this case, the last interceptor added will be the first to take control.</p>
</div>
</article>
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