# C1.WPF.C1Chart.Extended.ParametricFunctionSeries.XFunctionCode

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<h1 id="C1_WPF_C1Chart_Extended_ParametricFunctionSeries_XFunctionCode_" data-uid="C1.WPF.C1Chart.Extended.ParametricFunctionSeries.XFunctionCode*">XFunctionCode Property
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<a id="C1_WPF_C1Chart_Extended_ParametricFunctionSeries_XFunctionCode_" data-uid="C1.WPF.C1Chart.Extended.ParametricFunctionSeries.XFunctionCode*"></a>
<h4 id="C1_WPF_C1Chart_Extended_ParametricFunctionSeries_XFunctionCode" data-uid="C1.WPF.C1Chart.Extended.ParametricFunctionSeries.XFunctionCode">XFunctionCode</h4>
<div class="markdown level1 summary"><p>Gets or sets the code of function calculating x-value of data point.</p>
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<h5 class="declaration">Declaration</h5>
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  <pre><code class="lang-csharp hljs">[Obsolete(&quot;The property has no effect for .Net 4.0 version. Please use XFunction property to specify function.&quot;)]
public string XFunctionCode { get; set; }</code></pre>
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  <pre><code class="lang-vbnet hljs">&lt;Obsolete(&quot;The property has no effect for .Net 4.0 version. Please use XFunction property to specify function.&quot;)&gt;
Public Property XFunctionCode As String</code></pre>
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