# C1.C1Preview.DataBinding.ExpressionCollection.Add

## Content

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



<h1 id="C1_C1Preview_DataBinding_ExpressionCollection_Add_" data-uid="C1.C1Preview.DataBinding.ExpressionCollection.Add*">Add Method
</h1>
<div class="markdown level0 summary"></div>
<div class="markdown level0 conceptual"></div>



<a id="C1_C1Preview_DataBinding_ExpressionCollection_Add_" data-uid="C1.C1Preview.DataBinding.ExpressionCollection.Add*"></a>
<h4 id="C1_C1Preview_DataBinding_ExpressionCollection_Add_System_String_" data-uid="C1.C1Preview.DataBinding.ExpressionCollection.Add(System.String)">Add(string)</h4>
<div class="markdown level1 summary"><p>Creates an <a class="xref" href="C1.C1Preview.DataBinding.Expression.html">Expression</a> specified by its text,
and adds it to the current collection.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
<div class="codewrapper">
  <pre><code class="lang-csharp hljs">public Expression Add(string expression)</code></pre>
</div>
<div class="codewrapper">
  <pre><code class="lang-vbnet hljs">Public Function Add(expression As String) As Expression</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">expression</span></td>
      <td><p>The text of the expression to add.</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="C1.C1Preview.DataBinding.Expression.html">Expression</a></td>
      <td><p>The index of the added <a class="xref" href="C1.C1Preview.DataBinding.Expression.html">Expression</a> in the current collection.</p>
</td>
    </tr>
  </tbody>
</table>


<a id="C1_C1Preview_DataBinding_ExpressionCollection_Add_" data-uid="C1.C1Preview.DataBinding.ExpressionCollection.Add*"></a>
<h4 id="C1_C1Preview_DataBinding_ExpressionCollection_Add_C1_C1Preview_DataBinding_Expression_" data-uid="C1.C1Preview.DataBinding.ExpressionCollection.Add(C1.C1Preview.DataBinding.Expression)">Add(Expression)</h4>
<div class="markdown level1 summary"><p>Adds an <a class="xref" href="C1.C1Preview.DataBinding.Expression.html">Expression</a> to the current collection.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
<div class="codewrapper">
  <pre><code class="lang-csharp hljs">public int Add(Expression expression)</code></pre>
</div>
<div class="codewrapper">
  <pre><code class="lang-vbnet hljs">Public Function Add(expression As Expression) As Integer</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="C1.C1Preview.DataBinding.Expression.html">Expression</a></td>
      <td><span class="parametername">expression</span></td>
      <td><p>The <a class="xref" href="C1.C1Preview.DataBinding.Expression.html">Expression</a> to add.</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.int32">int</a></td>
      <td><p>The index of the added <a class="xref" href="C1.C1Preview.DataBinding.Expression.html">Expression</a> in the current collection.</p>
</td>
    </tr>
  </tbody>
</table>
</div>