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    <title>Class CallInvokerExtensions
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            <article class="content wrap" id="_content" data-uid="Grpc.Core.Interceptors.CallInvokerExtensions">
  
  
  <h1 id="Grpc_Core_Interceptors_CallInvokerExtensions" data-uid="Grpc.Core.Interceptors.CallInvokerExtensions" class="text-break">Class CallInvokerExtensions
  </h1>
  <div class="markdown level0 summary"><p>Extends the CallInvoker class to provide the interceptor facility on the client side.</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">CallInvokerExtensions</span></div>
  </div>
  <div class="inheritedMembers">
    <h5>Inherited Members</h5>
    <div>
      <span class="xref">System.Object.Equals(System.Object)</span>
    </div>
    <div>
      <span class="xref">System.Object.Equals(System.Object, System.Object)</span>
    </div>
    <div>
      <span class="xref">System.Object.GetHashCode()</span>
    </div>
    <div>
      <span class="xref">System.Object.GetType()</span>
    </div>
    <div>
      <span class="xref">System.Object.MemberwiseClone()</span>
    </div>
    <div>
      <span class="xref">System.Object.ReferenceEquals(System.Object, System.Object)</span>
    </div>
    <div>
      <span class="xref">System.Object.ToString()</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_CallInvokerExtensions_syntax">Syntax</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static class CallInvokerExtensions</code></pre>
  </div>
  <h3 id="methods">Methods
  </h3>
  <a id="Grpc_Core_Interceptors_CallInvokerExtensions_Intercept_" data-uid="Grpc.Core.Interceptors.CallInvokerExtensions.Intercept*"></a>
  <h4 id="Grpc_Core_Interceptors_CallInvokerExtensions_Intercept_Grpc_Core_CallInvoker_Grpc_Core_Interceptors_Interceptor_" data-uid="Grpc.Core.Interceptors.CallInvokerExtensions.Intercept(Grpc.Core.CallInvoker,Grpc.Core.Interceptors.Interceptor)">Intercept(CallInvoker, Interceptor)</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 CallInvoker invoker, 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.CallInvoker.html">CallInvoker</a></td>
        <td><span class="parametername">invoker</span></td>
        <td><p>The underlying invoker 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 calls to the invoker 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_CallInvokerExtensions_Intercept_Grpc_Core_CallInvoker_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;invoker.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 CallInvoker, effectively
building a chain like &quot;invoker.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_CallInvokerExtensions_Intercept_" data-uid="Grpc.Core.Interceptors.CallInvokerExtensions.Intercept*"></a>
  <h4 id="Grpc_Core_Interceptors_CallInvokerExtensions_Intercept_Grpc_Core_CallInvoker_Grpc_Core_Interceptors_Interceptor___" data-uid="Grpc.Core.Interceptors.CallInvokerExtensions.Intercept(Grpc.Core.CallInvoker,Grpc.Core.Interceptors.Interceptor[])">Intercept(CallInvoker, Interceptor[])</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 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 CallInvoker invoker, 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.CallInvoker.html">CallInvoker</a></td>
        <td><span class="parametername">invoker</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 calls to the invoker 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_CallInvokerExtensions_Intercept_Grpc_Core_CallInvoker_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;invoker.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 CallInvoker, effectively
building a chain like &quot;invoker.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_CallInvokerExtensions_Intercept_" data-uid="Grpc.Core.Interceptors.CallInvokerExtensions.Intercept*"></a>
  <h4 id="Grpc_Core_Interceptors_CallInvokerExtensions_Intercept_Grpc_Core_CallInvoker_System_Func_Grpc_Core_Metadata_Grpc_Core_Metadata__" data-uid="Grpc.Core.Interceptors.CallInvokerExtensions.Intercept(Grpc.Core.CallInvoker,System.Func{Grpc.Core.Metadata,Grpc.Core.Metadata})">Intercept(CallInvoker, 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 CallInvoker invoker, 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.CallInvoker.html">CallInvoker</a></td>
        <td><span class="parametername">invoker</span></td>
        <td><p>The underlying invoker to intercept.</p>
</td>
      </tr>
      <tr>
        <td><span class="xref">System.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_CallInvokerExtensions_Intercept_Grpc_Core_CallInvoker_System_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;invoker.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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