# C1.Win.ExpressionEditor.ExpressionEditorCollection.Add

## Content

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<h1 id="C1_Win_ExpressionEditor_ExpressionEditorCollection_Add_" data-uid="C1.Win.ExpressionEditor.ExpressionEditorCollection.Add*">Add Method
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<div class="markdown level0 conceptual"></div>



<a id="C1_Win_ExpressionEditor_ExpressionEditorCollection_Add_" data-uid="C1.Win.ExpressionEditor.ExpressionEditorCollection.Add*"></a>
<h4 id="C1_Win_ExpressionEditor_ExpressionEditorCollection_Add_System_String_" data-uid="C1.Win.ExpressionEditor.ExpressionEditorCollection.Add(System.String)">Add(string)</h4>
<div class="markdown level1 summary"><p>Adds new <a class="xref" href="C1.Win.ExpressionEditor.C1ExpressionEditor.html">C1ExpressionEditor</a> object into collection.</p>
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<h5 class="declaration">Declaration</h5>
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  <pre><code class="lang-csharp hljs">public C1ExpressionEditor Add(string columnName)</code></pre>
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  <pre><code class="lang-vbnet hljs">Public Function Add(columnName As String) As C1ExpressionEditor</code></pre>
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<h5 class="parameters">Parameters</h5>
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      <th>Type</th>
      <th>Name</th>
      <th>Description</th>
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    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.string">string</a></td>
      <td><span class="parametername">columnName</span></td>
      <td><p>specified column name.</p>
</td>
    </tr>
  </tbody>
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<h5 class="returns">Returns</h5>
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  <thead>
    <tr>
      <th>Type</th>
      <th>Description</th>
    </tr>
  </thead>
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    <tr>
      <td><a class="xref" href="C1.Win.ExpressionEditor.C1ExpressionEditor.html">C1ExpressionEditor</a></td>
      <td><p>returns added <a class="xref" href="C1.Win.ExpressionEditor.C1ExpressionEditor.html">C1ExpressionEditor</a> object</p>
</td>
    </tr>
  </tbody>
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<h5 class="exceptions">Exceptions</h5>
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    <tr>
      <th>Type</th>
      <th>Condition</th>
    </tr>
  </thead>
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    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.data.duplicatenameexception">DuplicateNameException</a></td>
      <td></td>
    </tr>
  </tbody>
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