# GrapeCity.Spreadsheet.Charts.ITrendlines

## Content

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  <h1 id="GrapeCity_Spreadsheet_Charts_ITrendlines" data-uid="GrapeCity.Spreadsheet.Charts.ITrendlines" class="text-break">ITrendlines Interface
</h1>
  <div class="markdown level0 summary"><p>Represents a collection of all the <a class="xref" href="GrapeCity.Spreadsheet.Charts.ITrendline.html">ITrendline</a> objects for the specified series.</p>
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  <div class="markdown level0 conceptual"></div>
  <h6><strong>Namespace</strong>: <a class="xref" href="GrapeCity.Spreadsheet.Charts.html">GrapeCity.Spreadsheet.Charts</a></h6>
  <h6><strong>Assembly</strong>: GrapeCity.Spreadsheet.dll</h6>
  <h5 id="GrapeCity_Spreadsheet_Charts_ITrendlines_syntax">Syntax</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public interface ITrendlines</code></pre>
  </div>
  <div class="codewrapper">
    <pre><code class="lang-vbnet hljs">Public Interface ITrendlines</code></pre>
  </div>
  <h3 id="properties">Properties
</h3>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Name</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td id="GrapeCity_Spreadsheet_Charts_ITrendlines_Count" data-uid="GrapeCity.Spreadsheet.Charts.ITrendlines.Count">
          <a class="xref" href="GrapeCity.Spreadsheet.Charts.ITrendlines.Count.html#GrapeCity_Spreadsheet_Charts_ITrendlines_Count">Count</a>
        </td>
        <td class="markdown level1 summary"><p>Gets the total number of trendlines in the collection.</p>
</td>
      </tr>
      <tr>
        <td id="GrapeCity_Spreadsheet_Charts_ITrendlines_Item_System_Int32_" data-uid="GrapeCity.Spreadsheet.Charts.ITrendlines.Item(System.Int32)">
          <a class="xref" href="GrapeCity.Spreadsheet.Charts.ITrendlines.Item.html#GrapeCity_Spreadsheet_Charts_ITrendlines_Item_System_Int32_">this[int]</a>
        </td>
        <td class="markdown level1 summary"><p>Gets a single <a class="xref" href="GrapeCity.Spreadsheet.Charts.ITrendline.html">ITrendline</a> object from the collection.</p>
</td>
      </tr>
    </tbody>
  </table>
  <h3 id="methods">Methods
</h3>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Name</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td id="GrapeCity_Spreadsheet_Charts_ITrendlines_Add_GrapeCity_Spreadsheet_Charts_TrendlineType_System_Int32_System_Int32_System_Double_System_Double_System_Double_System_Boolean_System_Boolean_System_String_" data-uid="GrapeCity.Spreadsheet.Charts.ITrendlines.Add(GrapeCity.Spreadsheet.Charts.TrendlineType,System.Int32,System.Int32,System.Double,System.Double,System.Double,System.Boolean,System.Boolean,System.String)">
          <a class="xref" href="GrapeCity.Spreadsheet.Charts.ITrendlines.Add.html#GrapeCity_Spreadsheet_Charts_ITrendlines_Add_GrapeCity_Spreadsheet_Charts_TrendlineType_System_Int32_System_Int32_System_Double_System_Double_System_Double_System_Boolean_System_Boolean_System_String_">Add(TrendlineType, int, int, double, double, double, bool, bool, string)</a>
        </td>
        <td class="markdown level1 summary"><p>Creates a new trendline.</p>
</td>
      </tr>
    </tbody>
  </table>

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