# GrapeCity.Documents.Excel.ICustomDocumentPropertyCollection.Add

## Content

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



<h1 id="GrapeCity_Documents_Excel_ICustomDocumentPropertyCollection_Add_" data-uid="GrapeCity.Documents.Excel.ICustomDocumentPropertyCollection.Add*">Add Method
</h1>
<div class="markdown level0 summary"></div>
<div class="markdown level0 conceptual"></div>



<a id="GrapeCity_Documents_Excel_ICustomDocumentPropertyCollection_Add_" data-uid="GrapeCity.Documents.Excel.ICustomDocumentPropertyCollection.Add*"></a>
<h4 id="GrapeCity_Documents_Excel_ICustomDocumentPropertyCollection_Add_System_String_System_String_" data-uid="GrapeCity.Documents.Excel.ICustomDocumentPropertyCollection.Add(System.String,System.String)">Add(string, string)</h4>
<div class="markdown level1 summary"><p>Creates a new <a class="xref" href="GrapeCity.Documents.Excel.IDocumentProperty.html">IDocumentProperty</a> and adds it to the list of custom document properties that are available for the current <a class="xref" href="GrapeCity.Documents.Excel.IWorkbook.html">IWorkbook</a>.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
<div class="codewrapper">
  <pre><code class="lang-csharp hljs">IDocumentProperty Add(string name, string value)</code></pre>
</div>
<div class="codewrapper">
  <pre><code class="lang-vbnet hljs">Function Add(name As String, value As String) As IDocumentProperty</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">name</span></td>
      <td><p>The new <a class="xref" href="GrapeCity.Documents.Excel.IDocumentProperty.html">IDocumentProperty</a> name.</p>
</td>
    </tr>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.string">string</a></td>
      <td><span class="parametername">value</span></td>
      <td><p>The value of the property.</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="GrapeCity.Documents.Excel.IDocumentProperty.html">IDocumentProperty</a></td>
      <td><p>The new <a class="xref" href="GrapeCity.Documents.Excel.IDocumentProperty.html">IDocumentProperty</a>.</p>
</td>
    </tr>
  </tbody>
</table>


<a id="GrapeCity_Documents_Excel_ICustomDocumentPropertyCollection_Add_" data-uid="GrapeCity.Documents.Excel.ICustomDocumentPropertyCollection.Add*"></a>
<h4 id="GrapeCity_Documents_Excel_ICustomDocumentPropertyCollection_Add_System_String_System_Int32_" data-uid="GrapeCity.Documents.Excel.ICustomDocumentPropertyCollection.Add(System.String,System.Int32)">Add(string, int)</h4>
<div class="markdown level1 summary"><p>Creates a new <a class="xref" href="GrapeCity.Documents.Excel.IDocumentProperty.html">IDocumentProperty</a> and adds it to the list of custom document properties that are available for the current <a class="xref" href="GrapeCity.Documents.Excel.IWorkbook.html">IWorkbook</a>.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
<div class="codewrapper">
  <pre><code class="lang-csharp hljs">IDocumentProperty Add(string name, int value)</code></pre>
</div>
<div class="codewrapper">
  <pre><code class="lang-vbnet hljs">Function Add(name As String, value As Integer) As IDocumentProperty</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">name</span></td>
      <td><p>The new <a class="xref" href="GrapeCity.Documents.Excel.IDocumentProperty.html">IDocumentProperty</a> name.</p>
</td>
    </tr>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></td>
      <td><span class="parametername">value</span></td>
      <td><p>The value of the property.</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="GrapeCity.Documents.Excel.IDocumentProperty.html">IDocumentProperty</a></td>
      <td><p>The new <a class="xref" href="GrapeCity.Documents.Excel.IDocumentProperty.html">IDocumentProperty</a>.</p>
</td>
    </tr>
  </tbody>
</table>


<a id="GrapeCity_Documents_Excel_ICustomDocumentPropertyCollection_Add_" data-uid="GrapeCity.Documents.Excel.ICustomDocumentPropertyCollection.Add*"></a>
<h4 id="GrapeCity_Documents_Excel_ICustomDocumentPropertyCollection_Add_System_String_System_DateTime_" data-uid="GrapeCity.Documents.Excel.ICustomDocumentPropertyCollection.Add(System.String,System.DateTime)">Add(string, DateTime)</h4>
<div class="markdown level1 summary"><p>Creates a new <a class="xref" href="GrapeCity.Documents.Excel.IDocumentProperty.html">IDocumentProperty</a> and adds it to the list of custom document properties that are available for the current <a class="xref" href="GrapeCity.Documents.Excel.IWorkbook.html">IWorkbook</a>.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
<div class="codewrapper">
  <pre><code class="lang-csharp hljs">IDocumentProperty Add(string name, DateTime value)</code></pre>
</div>
<div class="codewrapper">
  <pre><code class="lang-vbnet hljs">Function Add(name As String, value As Date) As IDocumentProperty</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">name</span></td>
      <td><p>The new <a class="xref" href="GrapeCity.Documents.Excel.IDocumentProperty.html">IDocumentProperty</a> name.</p>
</td>
    </tr>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.datetime">DateTime</a></td>
      <td><span class="parametername">value</span></td>
      <td><p>The value of the property.</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="GrapeCity.Documents.Excel.IDocumentProperty.html">IDocumentProperty</a></td>
      <td><p>The new <a class="xref" href="GrapeCity.Documents.Excel.IDocumentProperty.html">IDocumentProperty</a>.</p>
</td>
    </tr>
  </tbody>
</table>


<a id="GrapeCity_Documents_Excel_ICustomDocumentPropertyCollection_Add_" data-uid="GrapeCity.Documents.Excel.ICustomDocumentPropertyCollection.Add*"></a>
<h4 id="GrapeCity_Documents_Excel_ICustomDocumentPropertyCollection_Add_System_String_System_Boolean_" data-uid="GrapeCity.Documents.Excel.ICustomDocumentPropertyCollection.Add(System.String,System.Boolean)">Add(string, bool)</h4>
<div class="markdown level1 summary"><p>Creates a new <a class="xref" href="GrapeCity.Documents.Excel.IDocumentProperty.html">IDocumentProperty</a> and adds it to the list of custom document properties that are available for the current <a class="xref" href="GrapeCity.Documents.Excel.IWorkbook.html">IWorkbook</a>.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
<div class="codewrapper">
  <pre><code class="lang-csharp hljs">IDocumentProperty Add(string name, bool value)</code></pre>
</div>
<div class="codewrapper">
  <pre><code class="lang-vbnet hljs">Function Add(name As String, value As Boolean) As IDocumentProperty</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">name</span></td>
      <td><p>The new <a class="xref" href="GrapeCity.Documents.Excel.IDocumentProperty.html">IDocumentProperty</a> name.</p>
</td>
    </tr>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.boolean">bool</a></td>
      <td><span class="parametername">value</span></td>
      <td><p>The value of the property.</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="GrapeCity.Documents.Excel.IDocumentProperty.html">IDocumentProperty</a></td>
      <td><p>The new <a class="xref" href="GrapeCity.Documents.Excel.IDocumentProperty.html">IDocumentProperty</a>.</p>
</td>
    </tr>
  </tbody>
</table>


<a id="GrapeCity_Documents_Excel_ICustomDocumentPropertyCollection_Add_" data-uid="GrapeCity.Documents.Excel.ICustomDocumentPropertyCollection.Add*"></a>
<h4 id="GrapeCity_Documents_Excel_ICustomDocumentPropertyCollection_Add_System_String_System_Double_" data-uid="GrapeCity.Documents.Excel.ICustomDocumentPropertyCollection.Add(System.String,System.Double)">Add(string, double)</h4>
<div class="markdown level1 summary"><p>Creates a new <a class="xref" href="GrapeCity.Documents.Excel.IDocumentProperty.html">IDocumentProperty</a> and adds it to the list of custom document properties that are available for the current <a class="xref" href="GrapeCity.Documents.Excel.IWorkbook.html">IWorkbook</a>.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
<div class="codewrapper">
  <pre><code class="lang-csharp hljs">IDocumentProperty Add(string name, double value)</code></pre>
</div>
<div class="codewrapper">
  <pre><code class="lang-vbnet hljs">Function Add(name As String, value As Double) As IDocumentProperty</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">name</span></td>
      <td><p>The new <a class="xref" href="GrapeCity.Documents.Excel.IDocumentProperty.html">IDocumentProperty</a> name.</p>
</td>
    </tr>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.double">double</a></td>
      <td><span class="parametername">value</span></td>
      <td><p>The value of the property.</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="GrapeCity.Documents.Excel.IDocumentProperty.html">IDocumentProperty</a></td>
      <td><p>The new <a class="xref" href="GrapeCity.Documents.Excel.IDocumentProperty.html">IDocumentProperty</a>.</p>
</td>
    </tr>
  </tbody>
</table>
</div>