# C1.Win.TreeView.C1CheckListSelectedItemCollection

## Content

<div class="doc-site-dotnet-api-container">



  <h1 id="C1_Win_TreeView_C1CheckListSelectedItemCollection" data-uid="C1.Win.TreeView.C1CheckListSelectedItemCollection" class="text-break">C1CheckListSelectedItemCollection Class
</h1>
  <div class="markdown level0 summary"><p>Represents a collection of selected <a class="xref" href="C1.Win.TreeView.C1CheckListItem.html">C1CheckListItem</a> objects.</p>
</div>
  <div class="markdown level0 conceptual"></div>
  <div class="inheritance">
    <h5>Inheritance</h5>
    <div class="level0"><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object">object</a></div>
    <div class="level1"><span class="xref">C1CheckListSelectedItemCollection</span></div>
  </div>
  <div class="implements">
    <h5>Implements</h5>
    <div><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1">IEnumerable</a>&lt;<a class="xref" href="C1.Win.TreeView.C1CheckListItem.html">C1CheckListItem</a>&gt;</div>
    <div><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.ilist">IList</a></div>
    <div><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.icollection">ICollection</a></div>
    <div><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.ienumerable">IEnumerable</a></div>
    <div><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.specialized.inotifycollectionchanged">INotifyCollectionChanged</a></div>
  </div>
  <h6><strong>Namespace</strong>: <a class="xref" href="C1.Win.TreeView.html">C1.Win.TreeView</a></h6>
  <h6><strong>Assembly</strong>: C1.Win.TreeView.10.dll</h6>
  <h5 id="C1_Win_TreeView_C1CheckListSelectedItemCollection_syntax">Syntax</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public class C1CheckListSelectedItemCollection : IEnumerable&lt;C1CheckListItem&gt;, IList, ICollection, IEnumerable, INotifyCollectionChanged</code></pre>
  </div>
  <div class="codewrapper">
    <pre><code class="lang-vbnet hljs">Public Class C1CheckListSelectedItemCollection
    Implements IEnumerable(Of C1CheckListItem), IList, ICollection, IEnumerable, INotifyCollectionChanged</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="C1_Win_TreeView_C1CheckListSelectedItemCollection_Count" data-uid="C1.Win.TreeView.C1CheckListSelectedItemCollection.Count">
          <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.Count.html#C1_Win_TreeView_C1CheckListSelectedItemCollection_Count">Count</a>
        </td>
        <td class="markdown level1 summary"><p>Gets the number of items contained in the <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.html">C1CheckListSelectedItemCollection</a> instance.</p>
</td>
      </tr>
      <tr>
        <td id="C1_Win_TreeView_C1CheckListSelectedItemCollection_IsFixedSize" data-uid="C1.Win.TreeView.C1CheckListSelectedItemCollection.IsFixedSize">
          <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.IsFixedSize.html#C1_Win_TreeView_C1CheckListSelectedItemCollection_IsFixedSize">IsFixedSize</a>
        </td>
        <td class="markdown level1 summary"><p>Gets a value indicating whether the <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.html">C1CheckListSelectedItemCollection</a> instance is fixed size.</p>
</td>
      </tr>
      <tr>
        <td id="C1_Win_TreeView_C1CheckListSelectedItemCollection_IsReadOnly" data-uid="C1.Win.TreeView.C1CheckListSelectedItemCollection.IsReadOnly">
          <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.IsReadOnly.html#C1_Win_TreeView_C1CheckListSelectedItemCollection_IsReadOnly">IsReadOnly</a>
        </td>
        <td class="markdown level1 summary"><p>Gets a value indicating whether the <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.html">C1CheckListSelectedItemCollection</a> instance is read-only.</p>
</td>
      </tr>
      <tr>
        <td id="C1_Win_TreeView_C1CheckListSelectedItemCollection_IsSynchronized" data-uid="C1.Win.TreeView.C1CheckListSelectedItemCollection.IsSynchronized">
          <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.IsSynchronized.html#C1_Win_TreeView_C1CheckListSelectedItemCollection_IsSynchronized">IsSynchronized</a>
        </td>
        <td class="markdown level1 summary"><p>Gets a value indicating whether the <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.html">C1CheckListSelectedItemCollection</a> instance is synchronized.</p>
</td>
      </tr>
      <tr>
        <td id="C1_Win_TreeView_C1CheckListSelectedItemCollection_Item_System_Int32_" data-uid="C1.Win.TreeView.C1CheckListSelectedItemCollection.Item(System.Int32)">
          <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.Item.html#C1_Win_TreeView_C1CheckListSelectedItemCollection_Item_System_Int32_">this[int]</a>
        </td>
        <td class="markdown level1 summary"><p>Gets or sets the item at the specified index.</p>
</td>
      </tr>
      <tr>
        <td id="C1_Win_TreeView_C1CheckListSelectedItemCollection_SyncRoot" data-uid="C1.Win.TreeView.C1CheckListSelectedItemCollection.SyncRoot">
          <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.SyncRoot.html#C1_Win_TreeView_C1CheckListSelectedItemCollection_SyncRoot">SyncRoot</a>
        </td>
        <td class="markdown level1 summary"><p>Gets the synchronize root.</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="C1_Win_TreeView_C1CheckListSelectedItemCollection_Add_C1_Win_TreeView_C1CheckListItem_" data-uid="C1.Win.TreeView.C1CheckListSelectedItemCollection.Add(C1.Win.TreeView.C1CheckListItem)">
          <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.Add.html#C1_Win_TreeView_C1CheckListSelectedItemCollection_Add_C1_Win_TreeView_C1CheckListItem_">Add(C1CheckListItem)</a>
        </td>
        <td class="markdown level1 summary"><p>Adds an item to the <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.html">C1CheckListSelectedItemCollection</a>.</p>
</td>
      </tr>
      <tr>
        <td id="C1_Win_TreeView_C1CheckListSelectedItemCollection_Add_System_Object_" data-uid="C1.Win.TreeView.C1CheckListSelectedItemCollection.Add(System.Object)">
          <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.Add.html#C1_Win_TreeView_C1CheckListSelectedItemCollection_Add_System_Object_">Add(object)</a>
        </td>
        <td class="markdown level1 summary"><p>Adds an item to the <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.html">C1CheckListSelectedItemCollection</a>.</p>
</td>
      </tr>
      <tr>
        <td id="C1_Win_TreeView_C1CheckListSelectedItemCollection_AddRange_System_Collections_Generic_IEnumerable_C1_Win_TreeView_C1CheckListItem__" data-uid="C1.Win.TreeView.C1CheckListSelectedItemCollection.AddRange(System.Collections.Generic.IEnumerable{C1.Win.TreeView.C1CheckListItem})">
          <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.AddRange.html#C1_Win_TreeView_C1CheckListSelectedItemCollection_AddRange_System_Collections_Generic_IEnumerable_C1_Win_TreeView_C1CheckListItem__">AddRange(IEnumerable&lt;C1CheckListItem&gt;)</a>
        </td>
        <td class="markdown level1 summary"><p>Adds the items of the specified collection to the end of the <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.html">C1CheckListSelectedItemCollection</a>.</p>
</td>
      </tr>
      <tr>
        <td id="C1_Win_TreeView_C1CheckListSelectedItemCollection_AddRange_System_Collections_IEnumerable_" data-uid="C1.Win.TreeView.C1CheckListSelectedItemCollection.AddRange(System.Collections.IEnumerable)">
          <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.AddRange.html#C1_Win_TreeView_C1CheckListSelectedItemCollection_AddRange_System_Collections_IEnumerable_">AddRange(IEnumerable)</a>
        </td>
        <td class="markdown level1 summary"><p>Adds the items of the specified collection to the end of the <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.html">C1CheckListSelectedItemCollection</a>.</p>
</td>
      </tr>
      <tr>
        <td id="C1_Win_TreeView_C1CheckListSelectedItemCollection_Clear" data-uid="C1.Win.TreeView.C1CheckListSelectedItemCollection.Clear">
          <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.Clear.html#C1_Win_TreeView_C1CheckListSelectedItemCollection_Clear">Clear()</a>
        </td>
        <td class="markdown level1 summary"><p>Removes all items from the <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.html">C1CheckListSelectedItemCollection</a>.</p>
</td>
      </tr>
      <tr>
        <td id="C1_Win_TreeView_C1CheckListSelectedItemCollection_Contains_C1_Win_TreeView_C1CheckListItem_" data-uid="C1.Win.TreeView.C1CheckListSelectedItemCollection.Contains(C1.Win.TreeView.C1CheckListItem)">
          <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.Contains.html#C1_Win_TreeView_C1CheckListSelectedItemCollection_Contains_C1_Win_TreeView_C1CheckListItem_">Contains(C1CheckListItem)</a>
        </td>
        <td class="markdown level1 summary"><p>Determines whether an item is in the <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.html">C1CheckListSelectedItemCollection</a>.</p>
</td>
      </tr>
      <tr>
        <td id="C1_Win_TreeView_C1CheckListSelectedItemCollection_Contains_System_Object_" data-uid="C1.Win.TreeView.C1CheckListSelectedItemCollection.Contains(System.Object)">
          <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.Contains.html#C1_Win_TreeView_C1CheckListSelectedItemCollection_Contains_System_Object_">Contains(object)</a>
        </td>
        <td class="markdown level1 summary"><p>Determines whether an item is in the <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.html">C1CheckListSelectedItemCollection</a>.</p>
</td>
      </tr>
      <tr>
        <td id="C1_Win_TreeView_C1CheckListSelectedItemCollection_CopyTo_C1_Win_TreeView_C1CheckListItem___System_Int32_" data-uid="C1.Win.TreeView.C1CheckListSelectedItemCollection.CopyTo(C1.Win.TreeView.C1CheckListItem[],System.Int32)">
          <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.CopyTo.html#C1_Win_TreeView_C1CheckListSelectedItemCollection_CopyTo_C1_Win_TreeView_C1CheckListItem___System_Int32_">CopyTo(C1CheckListItem[], int)</a>
        </td>
        <td class="markdown level1 summary"><p>Copies the entire <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.html">C1CheckListSelectedItemCollection</a> to a compatible one-dimensional array, starting at the specified index of the target array.</p>
</td>
      </tr>
      <tr>
        <td id="C1_Win_TreeView_C1CheckListSelectedItemCollection_CopyTo_System_Array_System_Int32_" data-uid="C1.Win.TreeView.C1CheckListSelectedItemCollection.CopyTo(System.Array,System.Int32)">
          <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.CopyTo.html#C1_Win_TreeView_C1CheckListSelectedItemCollection_CopyTo_System_Array_System_Int32_">CopyTo(Array, int)</a>
        </td>
        <td class="markdown level1 summary"><p>Copies the entire <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.html">C1CheckListSelectedItemCollection</a> to a compatible one-dimensional array, starting at the specified index of the target array.</p>
</td>
      </tr>
      <tr>
        <td id="C1_Win_TreeView_C1CheckListSelectedItemCollection_GetEnumerator" data-uid="C1.Win.TreeView.C1CheckListSelectedItemCollection.GetEnumerator">
          <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.GetEnumerator.html#C1_Win_TreeView_C1CheckListSelectedItemCollection_GetEnumerator">GetEnumerator()</a>
        </td>
        <td class="markdown level1 summary"><p>Returns an enumerator that iterates through the <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.html">C1CheckListSelectedItemCollection</a>.</p>
</td>
      </tr>
      <tr>
        <td id="C1_Win_TreeView_C1CheckListSelectedItemCollection_IndexOf_C1_Win_TreeView_C1CheckListItem_" data-uid="C1.Win.TreeView.C1CheckListSelectedItemCollection.IndexOf(C1.Win.TreeView.C1CheckListItem)">
          <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.IndexOf.html#C1_Win_TreeView_C1CheckListSelectedItemCollection_IndexOf_C1_Win_TreeView_C1CheckListItem_">IndexOf(C1CheckListItem)</a>
        </td>
        <td class="markdown level1 summary"><p>Searches for the specified item and returns the zero-based index.</p>
</td>
      </tr>
      <tr>
        <td id="C1_Win_TreeView_C1CheckListSelectedItemCollection_IndexOf_System_Object_" data-uid="C1.Win.TreeView.C1CheckListSelectedItemCollection.IndexOf(System.Object)">
          <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.IndexOf.html#C1_Win_TreeView_C1CheckListSelectedItemCollection_IndexOf_System_Object_">IndexOf(object)</a>
        </td>
        <td class="markdown level1 summary"><p>Searches for the specified item and returns the zero-based index.</p>
</td>
      </tr>
      <tr>
        <td id="C1_Win_TreeView_C1CheckListSelectedItemCollection_Insert_System_Int32_C1_Win_TreeView_C1CheckListItem_" data-uid="C1.Win.TreeView.C1CheckListSelectedItemCollection.Insert(System.Int32,C1.Win.TreeView.C1CheckListItem)">
          <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.Insert.html#C1_Win_TreeView_C1CheckListSelectedItemCollection_Insert_System_Int32_C1_Win_TreeView_C1CheckListItem_">Insert(int, C1CheckListItem)</a>
        </td>
        <td class="markdown level1 summary"><p>Inserts item into the <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.html">C1CheckListSelectedItemCollection</a> at the specified index.</p>
</td>
      </tr>
      <tr>
        <td id="C1_Win_TreeView_C1CheckListSelectedItemCollection_Insert_System_Int32_System_Object_" data-uid="C1.Win.TreeView.C1CheckListSelectedItemCollection.Insert(System.Int32,System.Object)">
          <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.Insert.html#C1_Win_TreeView_C1CheckListSelectedItemCollection_Insert_System_Int32_System_Object_">Insert(int, object)</a>
        </td>
        <td class="markdown level1 summary"><p>Inserts item into the <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.html">C1CheckListSelectedItemCollection</a> at the specified index.</p>
</td>
      </tr>
      <tr>
        <td id="C1_Win_TreeView_C1CheckListSelectedItemCollection_OnCollectionChanged_System_Collections_Specialized_NotifyCollectionChangedEventArgs_" data-uid="C1.Win.TreeView.C1CheckListSelectedItemCollection.OnCollectionChanged(System.Collections.Specialized.NotifyCollectionChangedEventArgs)">
          <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.OnCollectionChanged.html#C1_Win_TreeView_C1CheckListSelectedItemCollection_OnCollectionChanged_System_Collections_Specialized_NotifyCollectionChangedEventArgs_">OnCollectionChanged(NotifyCollectionChangedEventArgs)</a>
        </td>
        <td class="markdown level1 summary"><p>Raise CollectionChanged event to any listeners.
Properties/methods modifying this <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.html">C1CheckListSelectedItemCollection</a> will raise
a collection changed event through this virtual method.</p>
</td>
      </tr>
      <tr>
        <td id="C1_Win_TreeView_C1CheckListSelectedItemCollection_Remove_C1_Win_TreeView_C1CheckListItem_" data-uid="C1.Win.TreeView.C1CheckListSelectedItemCollection.Remove(C1.Win.TreeView.C1CheckListItem)">
          <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.Remove.html#C1_Win_TreeView_C1CheckListSelectedItemCollection_Remove_C1_Win_TreeView_C1CheckListItem_">Remove(C1CheckListItem)</a>
        </td>
        <td class="markdown level1 summary"><p>Removes the first occurrence of a specified item from the collection.</p>
</td>
      </tr>
      <tr>
        <td id="C1_Win_TreeView_C1CheckListSelectedItemCollection_Remove_System_Object_" data-uid="C1.Win.TreeView.C1CheckListSelectedItemCollection.Remove(System.Object)">
          <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.Remove.html#C1_Win_TreeView_C1CheckListSelectedItemCollection_Remove_System_Object_">Remove(object)</a>
        </td>
        <td class="markdown level1 summary"><p>Removes the first occurrence of a specified item from the collection.</p>
</td>
      </tr>
      <tr>
        <td id="C1_Win_TreeView_C1CheckListSelectedItemCollection_RemoveAt_System_Int32_" data-uid="C1.Win.TreeView.C1CheckListSelectedItemCollection.RemoveAt(System.Int32)">
          <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.RemoveAt.html#C1_Win_TreeView_C1CheckListSelectedItemCollection_RemoveAt_System_Int32_">RemoveAt(int)</a>
        </td>
        <td class="markdown level1 summary"><p>Removes the item at the specified index of the collection.</p>
</td>
      </tr>
    </tbody>
  </table>
  <h3 id="events">Events
</h3>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Name</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td id="C1_Win_TreeView_C1CheckListSelectedItemCollection_CollectionChanged" data-uid="C1.Win.TreeView.C1CheckListSelectedItemCollection.CollectionChanged">
          <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.CollectionChanged.html">CollectionChanged</a>
        </td>
        <td class="markdown level1 summary"><p>Occurs when the <a class="xref" href="C1.Win.TreeView.C1CheckListSelectedItemCollection.html">C1CheckListSelectedItemCollection</a> changes, either by adding or removing an item.</p>
</td>
      </tr>
    </tbody>
  </table>

</div>
