IList.xml

<Type Name="IList" FullName="System.Collections.IList">
  <TypeSignature Language="C#" Value="public interface IList : System.Collections.ICollection" />
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  <TypeSignature Language="C++ CLI" Value="public interface class IList : System::Collections::ICollection" />
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  <Interfaces>
    <Interface>
      <InterfaceName>System.Collections.ICollection</InterfaceName>
    </Interface>
    <Interface>
      <InterfaceName>System.Collections.IEnumerable</InterfaceName>
    </Interface>
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  <Attributes>
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  </Attributes>
  <Docs>
    <summary>Represents a non-generic collection of objects that can be individually accessed by index.</summary>
    <remarks>
      <format type="text/markdown"><![CDATA[

## Remarks
 <xref:System.Collections.IList> is a descendant of the <xref:System.Collections.ICollection> interface and is the base interface of all non-generic lists. <xref:System.Collections.IList> implementations fall into three categories: read-only, fixed-size, and variable-size. A read-only <xref:System.Collections.IList> cannot be modified. A fixed-size <xref:System.Collections.IList> does not allow the addition or removal of elements, but it allows the modification of existing elements. A variable-size <xref:System.Collections.IList> allows the addition, removal, and modification of elements.

 For the generic version of this interface, see <xref:System.Collections.Generic.IList`1?displayProperty=nameWithType>.



## Examples
 The following example demonstrates the implementation of the <xref:System.Collections.IList> interface to create a simple, fixed-size list.

 :::code language="csharp" source="~/snippets/csharp/System.Collections/IList/Overview/Program.cs" id="Snippet01":::
 :::code language="vb" source="~/snippets/visualbasic/System.Collections/IList/Overview/Program.vb" id="Snippet01":::

 ]]></format>
    </remarks>
    <altmember cref="T:System.Collections.ArrayList" />
    <altmember cref="T:System.Collections.ICollection" />
    <altmember cref="T:System.Collections.Generic.IList`1" />
  </Docs>
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        <ReturnType>System.Int32</ReturnType>
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      <Parameters>
        <Parameter Name="value" Type="System.Object" />
      </Parameters>
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        <param name="value">The object to add to the <see cref="T:System.Collections.IList" />.</param>
        <summary>Adds an item to the <see cref="T:System.Collections.IList" />.</summary>
        <returns>The position into which the new element was inserted, or -1 to indicate that the item was not inserted into the collection.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Examples
 The following example demonstrates the implementation of the <xref:System.Collections.IList> interface to create a simple, fixed-size list. This code is part of a larger example for the <xref:System.Collections.IList> interface.

 :::code language="csharp" source="~/snippets/csharp/System.Collections/IList/Overview/Program.cs" id="Snippet02":::
 :::code language="vb" source="~/snippets/visualbasic/System.Collections/IList/Overview/Program.vb" id="Snippet02":::

 ]]></format>
        </remarks>
        <exception cref="T:System.NotSupportedException">The <see cref="T:System.Collections.IList" /> is read-only.

 -or-

 The <see cref="T:System.Collections.IList" /> has a fixed size.</exception>
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        <ReturnType>System.Void</ReturnType>
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        <summary>Removes all items from the <see cref="T:System.Collections.IList" />.</summary>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks
 Implementations of this method can vary in how they handle the <xref:System.Collections.ICollection.Count*?displayProperty=nameWithType> and the capacity of a collection. Typically, the count is set to zero, and references to other objects from elements of the collection are also released. The capacity can be set to zero or a default value, or it can remain unchanged.



## Examples
 The following example demonstrates the implementation of the <xref:System.Collections.IList> interface to create a simple, fixed-size list. This code is part of a larger example for the <xref:System.Collections.IList> interface.

 :::code language="csharp" source="~/snippets/csharp/System.Collections/IList/Overview/Program.cs" id="Snippet02":::
 :::code language="vb" source="~/snippets/visualbasic/System.Collections/IList/Overview/Program.vb" id="Snippet02":::

 ]]></format>
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        <param name="value">The object to locate in the <see cref="T:System.Collections.IList" />.</param>
        <summary>Determines whether the <see cref="T:System.Collections.IList" /> contains a specific value.</summary>
        <returns>
          <see langword="true" /> if the <see cref="T:System.Object" /> is found in the <see cref="T:System.Collections.IList" />; otherwise, <see langword="false" />.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

This method uses the collection's objects' <xref:System.Object.Equals*> and <xref:System.IComparable.CompareTo*> methods on `item` to determine whether item exists.

## Examples
 The following example demonstrates the implementation of the <xref:System.Collections.IList> interface to create a simple, fixed-size list. This code is part of a larger example for the <xref:System.Collections.IList> interface.

 :::code language="csharp" source="~/snippets/csharp/System.Collections/IList/Overview/Program.cs" id="Snippet02":::
 :::code language="vb" source="~/snippets/visualbasic/System.Collections/IList/Overview/Program.vb" id="Snippet02":::

 ]]></format>
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        <param name="value">The object to locate in the <see cref="T:System.Collections.IList" />.</param>
        <summary>Determines the index of a specific item in the <see cref="T:System.Collections.IList" />.</summary>
        <returns>The index of <paramref name="value" /> if found in the list; otherwise, -1.</returns>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks

This method uses the collection's objects' <xref:System.Object.Equals*> and <xref:System.IComparable.CompareTo*> methods on `item` to determine whether item exists.

## Examples
 The following example demonstrates the implementation of the <xref:System.Collections.IList> interface to create a simple, fixed-size list. This code is part of a larger example for the <xref:System.Collections.IList> interface.

 :::code language="csharp" source="~/snippets/csharp/System.Collections/IList/Overview/Program.cs" id="Snippet02":::
 :::code language="vb" source="~/snippets/visualbasic/System.Collections/IList/Overview/Program.vb" id="Snippet02":::

 ]]></format>
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      <AssemblyInfo>
        <AssemblyName>netstandard</AssemblyName>
        <AssemblyVersion>2.0.0.0</AssemblyVersion>
        <AssemblyVersion>2.1.0.0</AssemblyVersion>
      </AssemblyInfo>
      <ReturnValue>
        <ReturnType>System.Void</ReturnType>
      </ReturnValue>
      <Parameters>
        <Parameter Name="index" Type="System.Int32" />
        <Parameter Name="value" Type="System.Object" />
      </Parameters>
      <Docs>
        <param name="index">The zero-based index at which <paramref name="value" /> should be inserted.</param>
        <param name="value">The object to insert into the <see cref="T:System.Collections.IList" />.</param>
        <summary>Inserts an item to the <see cref="T:System.Collections.IList" /> at the specified index.</summary>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks
 If `index` equals the number of items in the <xref:System.Collections.IList>, then `value` is appended to the end.

 In collections of contiguous elements, such as lists, the elements that follow the insertion point move down to accommodate the new element. If the collection is indexed, the indexes of the elements that are moved are also updated. This behavior does not apply to collections where elements are conceptually grouped into buckets, such as a hash table.



## Examples
 The following example demonstrates the implementation of the <xref:System.Collections.IList> interface to create a simple, fixed-size list. This code is part of a larger example for the <xref:System.Collections.IList> interface.

 :::code language="csharp" source="~/snippets/csharp/System.Collections/IList/Overview/Program.cs" id="Snippet02":::
 :::code language="vb" source="~/snippets/visualbasic/System.Collections/IList/Overview/Program.vb" id="Snippet02":::

 ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentOutOfRangeException">
          <paramref name="index" /> is not a valid index in the <see cref="T:System.Collections.IList" />.</exception>
        <exception cref="T:System.NotSupportedException">The <see cref="T:System.Collections.IList" /> is read-only.

 -or-

 The <see cref="T:System.Collections.IList" /> has a fixed size.</exception>
        <exception cref="T:System.NullReferenceException">
          <paramref name="value" /> is null reference in the <see cref="T:System.Collections.IList" />.</exception>
      </Docs>
    </Member>
    <Member MemberName="IsFixedSize">
      <MemberSignature Language="C#" Value="public bool IsFixedSize { get; }" />
      <MemberSignature Language="ILAsm" Value=".property instance bool IsFixedSize" />
      <MemberSignature Language="DocId" Value="P:System.Collections.IList.IsFixedSize" />
      <MemberSignature Language="VB.NET" Value="Public ReadOnly Property IsFixedSize As Boolean" />
      <MemberSignature Language="F#" Value="member this.IsFixedSize : bool" Usage="System.Collections.IList.IsFixedSize" />
      <MemberSignature Language="C++ CLI" Value="public:&#xA; property bool IsFixedSize { bool get(); };" />
      <MemberType>Property</MemberType>
      <AssemblyInfo>
        <AssemblyName>System.Runtime</AssemblyName>
        <AssemblyVersion>4.0.0.0</AssemblyVersion>
        <AssemblyVersion>4.0.10.0</AssemblyVersion>
        <AssemblyVersion>4.0.20.0</AssemblyVersion>
        <AssemblyVersion>4.1.0.0</AssemblyVersion>
        <AssemblyVersion>4.2.0.0</AssemblyVersion>
        <AssemblyVersion>4.2.1.0</AssemblyVersion>
        <AssemblyVersion>4.2.2.0</AssemblyVersion>
        <AssemblyVersion>5.0.0.0</AssemblyVersion>
        <AssemblyVersion>6.0.0.0</AssemblyVersion>
        <AssemblyVersion>7.0.0.0</AssemblyVersion>
        <AssemblyVersion>8.0.0.0</AssemblyVersion>
        <AssemblyVersion>9.0.0.0</AssemblyVersion>
        <AssemblyVersion>10.0.0.0</AssemblyVersion>
        <AssemblyVersion>11.0.0.0</AssemblyVersion>
      </AssemblyInfo>
      <AssemblyInfo>
        <AssemblyName>mscorlib</AssemblyName>
        <AssemblyVersion>1.0.5000.0</AssemblyVersion>
        <AssemblyVersion>2.0.0.0</AssemblyVersion>
        <AssemblyVersion>2.0.5.0</AssemblyVersion>
        <AssemblyVersion>4.0.0.0</AssemblyVersion>
      </AssemblyInfo>
      <AssemblyInfo>
        <AssemblyName>netstandard</AssemblyName>
        <AssemblyVersion>2.0.0.0</AssemblyVersion>
        <AssemblyVersion>2.1.0.0</AssemblyVersion>
      </AssemblyInfo>
      <ReturnValue>
        <ReturnType>System.Boolean</ReturnType>
      </ReturnValue>
      <Docs>
        <summary>Gets a value indicating whether the <see cref="T:System.Collections.IList" /> has a fixed size.</summary>
        <value>
          <see langword="true" /> if the <see cref="T:System.Collections.IList" /> has a fixed size; otherwise, <see langword="false" />.</value>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks
 A collection with a fixed size does not allow the addition or removal of elements after the collection is created, but it allows the modification of existing elements.



## Examples
 The following example demonstrates the implementation of the <xref:System.Collections.IList> interface to create a simple, fixed-size list. This code is part of a larger example for the <xref:System.Collections.IList> interface.

 :::code language="csharp" source="~/snippets/csharp/System.Collections/IList/Overview/Program.cs" id="Snippet02":::
 :::code language="vb" source="~/snippets/visualbasic/System.Collections/IList/Overview/Program.vb" id="Snippet02":::

 ]]></format>
        </remarks>
      </Docs>
    </Member>
    <Member MemberName="IsReadOnly">
      <MemberSignature Language="C#" Value="public bool IsReadOnly { get; }" />
      <MemberSignature Language="ILAsm" Value=".property instance bool IsReadOnly" />
      <MemberSignature Language="DocId" Value="P:System.Collections.IList.IsReadOnly" />
      <MemberSignature Language="VB.NET" Value="Public ReadOnly Property IsReadOnly As Boolean" />
      <MemberSignature Language="F#" Value="member this.IsReadOnly : bool" Usage="System.Collections.IList.IsReadOnly" />
      <MemberSignature Language="C++ CLI" Value="public:&#xA; property bool IsReadOnly { bool get(); };" />
      <MemberType>Property</MemberType>
      <AssemblyInfo>
        <AssemblyName>System.Runtime</AssemblyName>
        <AssemblyVersion>4.0.0.0</AssemblyVersion>
        <AssemblyVersion>4.0.10.0</AssemblyVersion>
        <AssemblyVersion>4.0.20.0</AssemblyVersion>
        <AssemblyVersion>4.1.0.0</AssemblyVersion>
        <AssemblyVersion>4.2.0.0</AssemblyVersion>
        <AssemblyVersion>4.2.1.0</AssemblyVersion>
        <AssemblyVersion>4.2.2.0</AssemblyVersion>
        <AssemblyVersion>5.0.0.0</AssemblyVersion>
        <AssemblyVersion>6.0.0.0</AssemblyVersion>
        <AssemblyVersion>7.0.0.0</AssemblyVersion>
        <AssemblyVersion>8.0.0.0</AssemblyVersion>
        <AssemblyVersion>9.0.0.0</AssemblyVersion>
        <AssemblyVersion>10.0.0.0</AssemblyVersion>
        <AssemblyVersion>11.0.0.0</AssemblyVersion>
      </AssemblyInfo>
      <AssemblyInfo>
        <AssemblyName>mscorlib</AssemblyName>
        <AssemblyVersion>1.0.5000.0</AssemblyVersion>
        <AssemblyVersion>2.0.0.0</AssemblyVersion>
        <AssemblyVersion>2.0.5.0</AssemblyVersion>
        <AssemblyVersion>4.0.0.0</AssemblyVersion>
      </AssemblyInfo>
      <AssemblyInfo>
        <AssemblyName>netstandard</AssemblyName>
        <AssemblyVersion>2.0.0.0</AssemblyVersion>
        <AssemblyVersion>2.1.0.0</AssemblyVersion>
      </AssemblyInfo>
      <ReturnValue>
        <ReturnType>System.Boolean</ReturnType>
      </ReturnValue>
      <Docs>
        <summary>Gets a value indicating whether the <see cref="T:System.Collections.IList" /> is read-only.</summary>
        <value>
          <see langword="true" /> if the <see cref="T:System.Collections.IList" /> is read-only; otherwise, <see langword="false" />.</value>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks
 A collection that is read-only does not allow the addition, removal, or modification of elements after the collection is created.



## Examples
 The following example demonstrates the implementation of the <xref:System.Collections.IList> interface to create a simple, fixed-size list. This code is part of a larger example for the <xref:System.Collections.IList> interface.

 :::code language="csharp" source="~/snippets/csharp/System.Collections/IList/Overview/Program.cs" id="Snippet02":::
 :::code language="vb" source="~/snippets/visualbasic/System.Collections/IList/Overview/Program.vb" id="Snippet02":::

 ]]></format>
        </remarks>
      </Docs>
    </Member>
    <Member MemberName="Item">
      <MemberSignature Language="C#" Value="public object this[int index] { get; set; }" FrameworkAlternate="dotnet-uwp-10.0;netcore-1.0;netcore-1.1;netcore-2.0;netcore-2.1;netcore-2.2;netframework-1.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;netframework-4.8.1;netstandard-1.0;netstandard-1.1;netstandard-1.2;netstandard-1.3;netstandard-1.4;netstandard-1.5;netstandard-1.6;netstandard-2.0;netstandard-2.1" />
      <MemberSignature Language="ILAsm" Value=".property instance object Item(int32)" />
      <MemberSignature Language="DocId" Value="P:System.Collections.IList.Item(System.Int32)" />
      <MemberSignature Language="VB.NET" Value="Default Public Property Item(index As Integer) As Object" />
      <MemberSignature Language="F#" Value="member this.Item(int) : obj with get, set" Usage="System.Collections.IList.Item" />
      <MemberSignature Language="C++ CLI" Value="public:&#xA; property System::Object ^ default[int] { System::Object ^ get(int index); void set(int index, System::Object ^ value); };" />
      <MemberSignature Language="C#" Value="public object? this[int index] { get; set; }" FrameworkAlternate="net-10.0;net-11.0;net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-3.0;netcore-3.1" />
      <MemberType>Property</MemberType>
      <AssemblyInfo>
        <AssemblyName>System.Runtime</AssemblyName>
        <AssemblyVersion>4.0.0.0</AssemblyVersion>
        <AssemblyVersion>4.0.10.0</AssemblyVersion>
        <AssemblyVersion>4.0.20.0</AssemblyVersion>
        <AssemblyVersion>4.1.0.0</AssemblyVersion>
        <AssemblyVersion>4.2.0.0</AssemblyVersion>
        <AssemblyVersion>4.2.1.0</AssemblyVersion>
        <AssemblyVersion>4.2.2.0</AssemblyVersion>
        <AssemblyVersion>5.0.0.0</AssemblyVersion>
        <AssemblyVersion>6.0.0.0</AssemblyVersion>
        <AssemblyVersion>7.0.0.0</AssemblyVersion>
        <AssemblyVersion>8.0.0.0</AssemblyVersion>
        <AssemblyVersion>9.0.0.0</AssemblyVersion>
        <AssemblyVersion>10.0.0.0</AssemblyVersion>
        <AssemblyVersion>11.0.0.0</AssemblyVersion>
      </AssemblyInfo>
      <AssemblyInfo>
        <AssemblyName>mscorlib</AssemblyName>
        <AssemblyVersion>1.0.5000.0</AssemblyVersion>
        <AssemblyVersion>2.0.0.0</AssemblyVersion>
        <AssemblyVersion>2.0.5.0</AssemblyVersion>
        <AssemblyVersion>4.0.0.0</AssemblyVersion>
      </AssemblyInfo>
      <AssemblyInfo>
        <AssemblyName>netstandard</AssemblyName>
        <AssemblyVersion>2.0.0.0</AssemblyVersion>
        <AssemblyVersion>2.1.0.0</AssemblyVersion>
      </AssemblyInfo>
      <ReturnValue>
        <ReturnType>System.Object</ReturnType>
      </ReturnValue>
      <Parameters>
        <Parameter Name="index" Type="System.Int32" />
      </Parameters>
      <Docs>
        <param name="index">The zero-based index of the element to get or set.</param>
        <summary>Gets or sets the element at the specified index.</summary>
        <value>The element at the specified index.</value>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks
 This property provides the ability to access a specific element in the collection by using the following syntax: `myCollection[index]`.

 The C# language uses the [this](/dotnet/csharp/language-reference/keywords/this) keyword to define the indexers instead of implementing the <xref:System.Collections.IList.Item*> property. Visual Basic implements <xref:System.Collections.IList.Item*> as a default property, which provides the same indexing functionality.



## Examples
 The following example demonstrates the implementation of the <xref:System.Collections.IList> interface to create a simple, fixed-size list. This code is part of a larger example for the <xref:System.Collections.IList> interface.

 :::code language="csharp" source="~/snippets/csharp/System.Collections/IList/Overview/Program.cs" id="Snippet02":::
 :::code language="vb" source="~/snippets/visualbasic/System.Collections/IList/Overview/Program.vb" id="Snippet02":::

 ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentOutOfRangeException">
          <paramref name="index" /> is not a valid index in the <see cref="T:System.Collections.IList" />.</exception>
        <exception cref="T:System.NotSupportedException">The property is set and the <see cref="T:System.Collections.IList" /> is read-only.</exception>
      </Docs>
    </Member>
    <Member MemberName="Remove">
      <MemberSignature Language="C#" Value="public void Remove (object value);" FrameworkAlternate="dotnet-uwp-10.0;netcore-1.0;netcore-1.1;netcore-2.0;netcore-2.1;netcore-2.2;netframework-1.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;netframework-4.8.1;netstandard-1.0;netstandard-1.1;netstandard-1.2;netstandard-1.3;netstandard-1.4;netstandard-1.5;netstandard-1.6;netstandard-2.0;netstandard-2.1" />
      <MemberSignature Language="ILAsm" Value=".method public hidebysig newslot virtual instance void Remove(object value) cil managed" />
      <MemberSignature Language="DocId" Value="M:System.Collections.IList.Remove(System.Object)" />
      <MemberSignature Language="VB.NET" Value="Public Sub Remove (value As Object)" />
      <MemberSignature Language="F#" Value="abstract member Remove : obj -&gt; unit" Usage="iList.Remove value" />
      <MemberSignature Language="C++ CLI" Value="public:&#xA; void Remove(System::Object ^ value);" />
      <MemberSignature Language="C#" Value="public void Remove (object? value);" FrameworkAlternate="net-10.0;net-11.0;net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-3.0;netcore-3.1" />
      <MemberType>Method</MemberType>
      <AssemblyInfo>
        <AssemblyName>System.Runtime</AssemblyName>
        <AssemblyVersion>4.0.0.0</AssemblyVersion>
        <AssemblyVersion>4.0.10.0</AssemblyVersion>
        <AssemblyVersion>4.0.20.0</AssemblyVersion>
        <AssemblyVersion>4.1.0.0</AssemblyVersion>
        <AssemblyVersion>4.2.0.0</AssemblyVersion>
        <AssemblyVersion>4.2.1.0</AssemblyVersion>
        <AssemblyVersion>4.2.2.0</AssemblyVersion>
        <AssemblyVersion>5.0.0.0</AssemblyVersion>
        <AssemblyVersion>6.0.0.0</AssemblyVersion>
        <AssemblyVersion>7.0.0.0</AssemblyVersion>
        <AssemblyVersion>8.0.0.0</AssemblyVersion>
        <AssemblyVersion>9.0.0.0</AssemblyVersion>
        <AssemblyVersion>10.0.0.0</AssemblyVersion>
        <AssemblyVersion>11.0.0.0</AssemblyVersion>
      </AssemblyInfo>
      <AssemblyInfo>
        <AssemblyName>mscorlib</AssemblyName>
        <AssemblyVersion>1.0.5000.0</AssemblyVersion>
        <AssemblyVersion>2.0.0.0</AssemblyVersion>
        <AssemblyVersion>2.0.5.0</AssemblyVersion>
        <AssemblyVersion>4.0.0.0</AssemblyVersion>
      </AssemblyInfo>
      <AssemblyInfo>
        <AssemblyName>netstandard</AssemblyName>
        <AssemblyVersion>2.0.0.0</AssemblyVersion>
        <AssemblyVersion>2.1.0.0</AssemblyVersion>
      </AssemblyInfo>
      <ReturnValue>
        <ReturnType>System.Void</ReturnType>
      </ReturnValue>
      <Parameters>
        <Parameter Name="value" Type="System.Object" />
      </Parameters>
      <Docs>
        <param name="value">The object to remove from the <see cref="T:System.Collections.IList" />.</param>
        <summary>Removes the first occurrence of a specific object from the <see cref="T:System.Collections.IList" />.</summary>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks
 In collections of contiguous elements, such as lists, the elements that follow the removed element move up to occupy the vacated spot. If the collection is indexed, the indexes of the elements that are moved are also updated. This behavior does not apply to collections where elements are conceptually grouped into buckets, such as a hash table. If `value` is not found in the <xref:System.Collections.IList>, the <xref:System.Collections.IList> remains unchanged and no exception is thrown.



## Examples
 The following example demonstrates the implementation of the <xref:System.Collections.IList> interface to create a simple, fixed-size list. This code is part of a larger example for the <xref:System.Collections.IList> interface.

 :::code language="csharp" source="~/snippets/csharp/System.Collections/IList/Overview/Program.cs" id="Snippet02":::
 :::code language="vb" source="~/snippets/visualbasic/System.Collections/IList/Overview/Program.vb" id="Snippet02":::

 ]]></format>
        </remarks>
        <exception cref="T:System.NotSupportedException">The <see cref="T:System.Collections.IList" /> is read-only.

 -or-

 The <see cref="T:System.Collections.IList" /> has a fixed size.</exception>
        <block subset="none" type="overrides">
          <para>If <paramref name="value" /> is not in the list, the <see cref="M:System.Collections.IList.Remove(System.Object)" /> method should do nothing. In particular, it should not throw an exception.</para>
        </block>
      </Docs>
    </Member>
    <Member MemberName="RemoveAt">
      <MemberSignature Language="C#" Value="public void RemoveAt (int index);" />
      <MemberSignature Language="ILAsm" Value=".method public hidebysig newslot virtual instance void RemoveAt(int32 index) cil managed" />
      <MemberSignature Language="DocId" Value="M:System.Collections.IList.RemoveAt(System.Int32)" />
      <MemberSignature Language="VB.NET" Value="Public Sub RemoveAt (index As Integer)" />
      <MemberSignature Language="F#" Value="abstract member RemoveAt : int -&gt; unit" Usage="iList.RemoveAt index" />
      <MemberSignature Language="C++ CLI" Value="public:&#xA; void RemoveAt(int index);" />
      <MemberType>Method</MemberType>
      <AssemblyInfo>
        <AssemblyName>System.Runtime</AssemblyName>
        <AssemblyVersion>4.0.0.0</AssemblyVersion>
        <AssemblyVersion>4.0.10.0</AssemblyVersion>
        <AssemblyVersion>4.0.20.0</AssemblyVersion>
        <AssemblyVersion>4.1.0.0</AssemblyVersion>
        <AssemblyVersion>4.2.0.0</AssemblyVersion>
        <AssemblyVersion>4.2.1.0</AssemblyVersion>
        <AssemblyVersion>4.2.2.0</AssemblyVersion>
        <AssemblyVersion>5.0.0.0</AssemblyVersion>
        <AssemblyVersion>6.0.0.0</AssemblyVersion>
        <AssemblyVersion>7.0.0.0</AssemblyVersion>
        <AssemblyVersion>8.0.0.0</AssemblyVersion>
        <AssemblyVersion>9.0.0.0</AssemblyVersion>
        <AssemblyVersion>10.0.0.0</AssemblyVersion>
        <AssemblyVersion>11.0.0.0</AssemblyVersion>
      </AssemblyInfo>
      <AssemblyInfo>
        <AssemblyName>mscorlib</AssemblyName>
        <AssemblyVersion>1.0.5000.0</AssemblyVersion>
        <AssemblyVersion>2.0.0.0</AssemblyVersion>
        <AssemblyVersion>2.0.5.0</AssemblyVersion>
        <AssemblyVersion>4.0.0.0</AssemblyVersion>
      </AssemblyInfo>
      <AssemblyInfo>
        <AssemblyName>netstandard</AssemblyName>
        <AssemblyVersion>2.0.0.0</AssemblyVersion>
        <AssemblyVersion>2.1.0.0</AssemblyVersion>
      </AssemblyInfo>
      <ReturnValue>
        <ReturnType>System.Void</ReturnType>
      </ReturnValue>
      <Parameters>
        <Parameter Name="index" Type="System.Int32" />
      </Parameters>
      <Docs>
        <param name="index">The zero-based index of the item to remove.</param>
        <summary>Removes the <see cref="T:System.Collections.IList" /> item at the specified index.</summary>
        <remarks>
          <format type="text/markdown"><![CDATA[

## Remarks
 In collections of contiguous elements, such as lists, the elements that follow the removed element move up to occupy the vacated spot. If the collection is indexed, the indexes of the elements that are moved are also updated. This behavior does not apply to collections where elements are conceptually grouped into buckets, such as a hash table.



## Examples
 The following example demonstrates the implementation of the <xref:System.Collections.IList> interface to create a simple, fixed-size list. This code is part of a larger example for the <xref:System.Collections.IList> interface.

 :::code language="csharp" source="~/snippets/csharp/System.Collections/IList/Overview/Program.cs" id="Snippet02":::
 :::code language="vb" source="~/snippets/visualbasic/System.Collections/IList/Overview/Program.vb" id="Snippet02":::

 ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentOutOfRangeException">
          <paramref name="index" /> is not a valid index in the <see cref="T:System.Collections.IList" />.</exception>
        <exception cref="T:System.NotSupportedException">The <see cref="T:System.Collections.IList" /> is read-only.

 -or-

 The <see cref="T:System.Collections.IList" /> has a fixed size.</exception>
      </Docs>
    </Member>
  </Members>
</Type>