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    <title>Class CallInvoker
   | gRPC for .NET </title>
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   | gRPC for .NET ">
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            <article class="content wrap" id="_content" data-uid="Grpc.Core.CallInvoker">
  
  
  <h1 id="Grpc_Core_CallInvoker" data-uid="Grpc.Core.CallInvoker" class="text-break">Class CallInvoker
  </h1>
  <div class="markdown level0 summary"><p>Abstraction of client-side RPC invocation.</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">CallInvoker</span></div>
  </div>
  <h6><strong>Namespace</strong>: <a class="xref" href="Grpc.Core.html">Grpc.Core</a></h6>
  <h6><strong>Assembly</strong>: Grpc.Core.Api.dll</h6>
  <h5 id="Grpc_Core_CallInvoker_syntax">Syntax</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public abstract class CallInvoker : object</code></pre>
  </div>
  <h3 id="methods">Methods
  </h3>
  <a id="Grpc_Core_CallInvoker_AsyncClientStreamingCall_" data-uid="Grpc.Core.CallInvoker.AsyncClientStreamingCall*"></a>
  <h4 id="Grpc_Core_CallInvoker_AsyncClientStreamingCall__2_Grpc_Core_Method___0___1__System_String_Grpc_Core_CallOptions_" data-uid="Grpc.Core.CallInvoker.AsyncClientStreamingCall``2(Grpc.Core.Method{``0,``1},System.String,Grpc.Core.CallOptions)">AsyncClientStreamingCall&lt;TRequest, TResponse&gt;(Method&lt;TRequest, TResponse&gt;, String, CallOptions)</h4>
  <div class="markdown level1 summary"><p>Invokes a client streaming call asynchronously.
In client streaming scenario, client sends a stream of requests and server responds with a single response.</p>
</div>
  <div class="markdown level1 conceptual"></div>
  <h5 class="decalaration">Declaration</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public abstract AsyncClientStreamingCall&lt;TRequest, TResponse&gt; AsyncClientStreamingCall&lt;TRequest, TResponse&gt;(Method&lt;TRequest, TResponse&gt; method, string host, CallOptions options)
    where TRequest : class where TResponse : class</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.Method-2.html">Method</a>&lt;TRequest, TResponse&gt;</td>
        <td><span class="parametername">method</span></td>
        <td></td>
      </tr>
      <tr>
        <td><span class="xref">System.String</span></td>
        <td><span class="parametername">host</span></td>
        <td></td>
      </tr>
      <tr>
        <td><a class="xref" href="Grpc.Core.CallOptions.html">CallOptions</a></td>
        <td><span class="parametername">options</span></td>
        <td></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.AsyncClientStreamingCall-2.html">AsyncClientStreamingCall</a>&lt;TRequest, TResponse&gt;</td>
        <td></td>
      </tr>
    </tbody>
  </table>
  <h5 class="typeParameters">Type Parameters</h5>
  <table class="table table-bordered table-striped table-condensed">
    <thead>
      <tr>
        <th>Name</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><span class="parametername">TRequest</span></td>
        <td></td>
      </tr>
      <tr>
        <td><span class="parametername">TResponse</span></td>
        <td></td>
      </tr>
    </tbody>
  </table>
  <a id="Grpc_Core_CallInvoker_AsyncDuplexStreamingCall_" data-uid="Grpc.Core.CallInvoker.AsyncDuplexStreamingCall*"></a>
  <h4 id="Grpc_Core_CallInvoker_AsyncDuplexStreamingCall__2_Grpc_Core_Method___0___1__System_String_Grpc_Core_CallOptions_" data-uid="Grpc.Core.CallInvoker.AsyncDuplexStreamingCall``2(Grpc.Core.Method{``0,``1},System.String,Grpc.Core.CallOptions)">AsyncDuplexStreamingCall&lt;TRequest, TResponse&gt;(Method&lt;TRequest, TResponse&gt;, String, CallOptions)</h4>
  <div class="markdown level1 summary"><p>Invokes a duplex streaming call asynchronously.
In duplex streaming scenario, client sends a stream of requests and server responds with a stream of responses.
The response stream is completely independent and both side can be sending messages at the same time.</p>
</div>
  <div class="markdown level1 conceptual"></div>
  <h5 class="decalaration">Declaration</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public abstract AsyncDuplexStreamingCall&lt;TRequest, TResponse&gt; AsyncDuplexStreamingCall&lt;TRequest, TResponse&gt;(Method&lt;TRequest, TResponse&gt; method, string host, CallOptions options)
    where TRequest : class where TResponse : class</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.Method-2.html">Method</a>&lt;TRequest, TResponse&gt;</td>
        <td><span class="parametername">method</span></td>
        <td></td>
      </tr>
      <tr>
        <td><span class="xref">System.String</span></td>
        <td><span class="parametername">host</span></td>
        <td></td>
      </tr>
      <tr>
        <td><a class="xref" href="Grpc.Core.CallOptions.html">CallOptions</a></td>
        <td><span class="parametername">options</span></td>
        <td></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.AsyncDuplexStreamingCall-2.html">AsyncDuplexStreamingCall</a>&lt;TRequest, TResponse&gt;</td>
        <td></td>
      </tr>
    </tbody>
  </table>
  <h5 class="typeParameters">Type Parameters</h5>
  <table class="table table-bordered table-striped table-condensed">
    <thead>
      <tr>
        <th>Name</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><span class="parametername">TRequest</span></td>
        <td></td>
      </tr>
      <tr>
        <td><span class="parametername">TResponse</span></td>
        <td></td>
      </tr>
    </tbody>
  </table>
  <a id="Grpc_Core_CallInvoker_AsyncServerStreamingCall_" data-uid="Grpc.Core.CallInvoker.AsyncServerStreamingCall*"></a>
  <h4 id="Grpc_Core_CallInvoker_AsyncServerStreamingCall__2_Grpc_Core_Method___0___1__System_String_Grpc_Core_CallOptions___0_" data-uid="Grpc.Core.CallInvoker.AsyncServerStreamingCall``2(Grpc.Core.Method{``0,``1},System.String,Grpc.Core.CallOptions,``0)">AsyncServerStreamingCall&lt;TRequest, TResponse&gt;(Method&lt;TRequest, TResponse&gt;, String, CallOptions, TRequest)</h4>
  <div class="markdown level1 summary"><p>Invokes a server streaming call asynchronously.
In server streaming scenario, client sends on request and server responds with a stream of responses.</p>
</div>
  <div class="markdown level1 conceptual"></div>
  <h5 class="decalaration">Declaration</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public abstract AsyncServerStreamingCall&lt;TResponse&gt; AsyncServerStreamingCall&lt;TRequest, TResponse&gt;(Method&lt;TRequest, TResponse&gt; method, string host, CallOptions options, TRequest request)
    where TRequest : class where TResponse : class</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.Method-2.html">Method</a>&lt;TRequest, TResponse&gt;</td>
        <td><span class="parametername">method</span></td>
        <td></td>
      </tr>
      <tr>
        <td><span class="xref">System.String</span></td>
        <td><span class="parametername">host</span></td>
        <td></td>
      </tr>
      <tr>
        <td><a class="xref" href="Grpc.Core.CallOptions.html">CallOptions</a></td>
        <td><span class="parametername">options</span></td>
        <td></td>
      </tr>
      <tr>
        <td><span class="xref">TRequest</span></td>
        <td><span class="parametername">request</span></td>
        <td></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.AsyncServerStreamingCall-1.html">AsyncServerStreamingCall</a>&lt;TResponse&gt;</td>
        <td></td>
      </tr>
    </tbody>
  </table>
  <h5 class="typeParameters">Type Parameters</h5>
  <table class="table table-bordered table-striped table-condensed">
    <thead>
      <tr>
        <th>Name</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><span class="parametername">TRequest</span></td>
        <td></td>
      </tr>
      <tr>
        <td><span class="parametername">TResponse</span></td>
        <td></td>
      </tr>
    </tbody>
  </table>
  <a id="Grpc_Core_CallInvoker_AsyncUnaryCall_" data-uid="Grpc.Core.CallInvoker.AsyncUnaryCall*"></a>
  <h4 id="Grpc_Core_CallInvoker_AsyncUnaryCall__2_Grpc_Core_Method___0___1__System_String_Grpc_Core_CallOptions___0_" data-uid="Grpc.Core.CallInvoker.AsyncUnaryCall``2(Grpc.Core.Method{``0,``1},System.String,Grpc.Core.CallOptions,``0)">AsyncUnaryCall&lt;TRequest, TResponse&gt;(Method&lt;TRequest, TResponse&gt;, String, CallOptions, TRequest)</h4>
  <div class="markdown level1 summary"><p>Invokes a simple remote call asynchronously.</p>
</div>
  <div class="markdown level1 conceptual"></div>
  <h5 class="decalaration">Declaration</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public abstract AsyncUnaryCall&lt;TResponse&gt; AsyncUnaryCall&lt;TRequest, TResponse&gt;(Method&lt;TRequest, TResponse&gt; method, string host, CallOptions options, TRequest request)
    where TRequest : class where TResponse : class</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.Method-2.html">Method</a>&lt;TRequest, TResponse&gt;</td>
        <td><span class="parametername">method</span></td>
        <td></td>
      </tr>
      <tr>
        <td><span class="xref">System.String</span></td>
        <td><span class="parametername">host</span></td>
        <td></td>
      </tr>
      <tr>
        <td><a class="xref" href="Grpc.Core.CallOptions.html">CallOptions</a></td>
        <td><span class="parametername">options</span></td>
        <td></td>
      </tr>
      <tr>
        <td><span class="xref">TRequest</span></td>
        <td><span class="parametername">request</span></td>
        <td></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.AsyncUnaryCall-1.html">AsyncUnaryCall</a>&lt;TResponse&gt;</td>
        <td></td>
      </tr>
    </tbody>
  </table>
  <h5 class="typeParameters">Type Parameters</h5>
  <table class="table table-bordered table-striped table-condensed">
    <thead>
      <tr>
        <th>Name</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><span class="parametername">TRequest</span></td>
        <td></td>
      </tr>
      <tr>
        <td><span class="parametername">TResponse</span></td>
        <td></td>
      </tr>
    </tbody>
  </table>
  <a id="Grpc_Core_CallInvoker_BlockingUnaryCall_" data-uid="Grpc.Core.CallInvoker.BlockingUnaryCall*"></a>
  <h4 id="Grpc_Core_CallInvoker_BlockingUnaryCall__2_Grpc_Core_Method___0___1__System_String_Grpc_Core_CallOptions___0_" data-uid="Grpc.Core.CallInvoker.BlockingUnaryCall``2(Grpc.Core.Method{``0,``1},System.String,Grpc.Core.CallOptions,``0)">BlockingUnaryCall&lt;TRequest, TResponse&gt;(Method&lt;TRequest, TResponse&gt;, String, CallOptions, TRequest)</h4>
  <div class="markdown level1 summary"><p>Invokes a simple remote call in a blocking fashion.</p>
</div>
  <div class="markdown level1 conceptual"></div>
  <h5 class="decalaration">Declaration</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public abstract TResponse BlockingUnaryCall&lt;TRequest, TResponse&gt;(Method&lt;TRequest, TResponse&gt; method, string host, CallOptions options, TRequest request)
    where TRequest : class where TResponse : class</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.Method-2.html">Method</a>&lt;TRequest, TResponse&gt;</td>
        <td><span class="parametername">method</span></td>
        <td></td>
      </tr>
      <tr>
        <td><span class="xref">System.String</span></td>
        <td><span class="parametername">host</span></td>
        <td></td>
      </tr>
      <tr>
        <td><a class="xref" href="Grpc.Core.CallOptions.html">CallOptions</a></td>
        <td><span class="parametername">options</span></td>
        <td></td>
      </tr>
      <tr>
        <td><span class="xref">TRequest</span></td>
        <td><span class="parametername">request</span></td>
        <td></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><span class="xref">TResponse</span></td>
        <td></td>
      </tr>
    </tbody>
  </table>
  <h5 class="typeParameters">Type Parameters</h5>
  <table class="table table-bordered table-striped table-condensed">
    <thead>
      <tr>
        <th>Name</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><span class="parametername">TRequest</span></td>
        <td></td>
      </tr>
      <tr>
        <td><span class="parametername">TResponse</span></td>
        <td></td>
      </tr>
    </tbody>
  </table>
  <h3 id="extensionmethods">Extension Methods</h3>
  <div>
      <a class="xref" href="Grpc.Core.Interceptors.CallInvokerExtensions.html#Grpc_Core_Interceptors_CallInvokerExtensions_Intercept_Grpc_Core_CallInvoker_Grpc_Core_Interceptors_Interceptor_">CallInvokerExtensions.Intercept(CallInvoker, Interceptor)</a>
  </div>
  <div>
      <a class="xref" href="Grpc.Core.Interceptors.CallInvokerExtensions.html#Grpc_Core_Interceptors_CallInvokerExtensions_Intercept_Grpc_Core_CallInvoker_Grpc_Core_Interceptors_Interceptor___">CallInvokerExtensions.Intercept(CallInvoker, Interceptor[])</a>
  </div>
  <div>
      <a class="xref" href="Grpc.Core.Interceptors.CallInvokerExtensions.html#Grpc_Core_Interceptors_CallInvokerExtensions_Intercept_Grpc_Core_CallInvoker_Func_Grpc_Core_Metadata_Grpc_Core_Metadata__">CallInvokerExtensions.Intercept(CallInvoker, Func&lt;Metadata, Metadata&gt;)</a>
  </div>
</article>
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