# C1.LiveLinq.SourceChangeEventArgs-1.Ordinal

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<h1 id="C1_LiveLinq_SourceChangeEventArgs_1_Ordinal_" data-uid="C1.LiveLinq.SourceChangeEventArgs`1.Ordinal*">Ordinal Property
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<a id="C1_LiveLinq_SourceChangeEventArgs_1_Ordinal_" data-uid="C1.LiveLinq.SourceChangeEventArgs`1.Ordinal*"></a>
<h4 id="C1_LiveLinq_SourceChangeEventArgs_1_Ordinal" data-uid="C1.LiveLinq.SourceChangeEventArgs`1.Ordinal">Ordinal</h4>
<div class="markdown level1 summary"><p>Gets the ordinal position of the collection item that is being changed.</p>
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<h5 class="declaration">Declaration</h5>
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  <pre><code class="lang-csharp hljs">public int Ordinal { get; }</code></pre>
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  <pre><code class="lang-vbnet hljs">Public ReadOnly Property Ordinal As Integer</code></pre>
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<h5 id="C1_LiveLinq_SourceChangeEventArgs_1_Ordinal_remarks">Remarks</h5>
<div class="markdown level1 remarks"><p>This property can return -1 (ordinal unknown) if the collection cannot provide this information
(if <a class="xref" href="C1.LiveLinq.IObservableSource-1.SupportsItemOrdinals.html#C1_LiveLinq_IObservableSource_1_SupportsItemOrdinals">SupportsItemOrdinals</a> returns <b>false</b>).</p>
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