# C1.DataCollection.C1LengthList-1.IsReadOnly

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<h1 id="C1_DataCollection_C1LengthList_1_IsReadOnly_" data-uid="C1.DataCollection.C1LengthList`1.IsReadOnly*">IsReadOnly Property
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<a id="C1_DataCollection_C1LengthList_1_IsReadOnly_" data-uid="C1.DataCollection.C1LengthList`1.IsReadOnly*"></a>
<h4 id="C1_DataCollection_C1LengthList_1_IsReadOnly" data-uid="C1.DataCollection.C1LengthList`1.IsReadOnly">IsReadOnly</h4>
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<h5 class="declaration">Declaration</h5>
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  <pre><code class="lang-csharp hljs">public bool IsReadOnly { get; }</code></pre>
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  <pre><code class="lang-vbnet hljs">Public ReadOnly Property IsReadOnly As Boolean</code></pre>
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<h5 class="implements">Implements</h5>
    <div><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.icollection-1.isreadonly">ICollection&lt;T&gt;.IsReadOnly</a></div>
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