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Dictionary`2+KeyCollection+Enumerator.xml
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<Type Name="Dictionary<TKey,TValue>+KeyCollection+Enumerator" FullName="System.Collections.Generic.Dictionary<TKey,TValue>+KeyCollection+Enumerator">
<TypeSignature Language="C#" Value="public struct Dictionary<TKey,TValue>.KeyCollection.Enumerator : System.Collections.Generic.IEnumerator<TKey>" />
<TypeSignature Language="ILAsm" Value=".class nested public sequential ansi sealed beforefieldinit Dictionary`2/KeyCollection/Enumerator<TKey, TValue> extends System.ValueType implements class System.Collections.Generic.IEnumerator`1<!TKey>, class System.Collections.IEnumerator, class System.IDisposable" FrameworkAlternate="dotnet-uwp-10.0;net-10.0;net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-1.0;netcore-1.1;netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1;netstandard-1.0;netstandard-1.1;netstandard-1.2;netstandard-1.3;netstandard-1.4;netstandard-1.6;netstandard-2.0;netstandard-2.1" />
<TypeSignature Language="DocId" Value="T:System.Collections.Generic.Dictionary`2.KeyCollection.Enumerator" />
<TypeSignature Language="VB.NET" Value="Public Structure Dictionary(Of TKey, TValue).KeyCollection.Enumerator
Implements IEnumerator(Of TKey)" />
<TypeSignature Language="F#" Value="type Dictionary<'Key, 'Value>.KeyCollection.Enumerator = struct
 interface IEnumerator<'Key>
 interface IEnumerator
 interface IDisposable" FrameworkAlternate="dotnet-uwp-10.0;net-10.0;net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-1.0;netcore-1.1;netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1;netstandard-1.0;netstandard-1.1;netstandard-1.2;netstandard-1.3;netstandard-1.4;netstandard-1.6;netstandard-2.0;netstandard-2.1" />
<TypeSignature Language="C++ CLI" Value="public: value class Dictionary<TKey, TValue>::KeyCollection::Enumerator : System::Collections::Generic::IEnumerator<TKey>" />
<TypeSignature Language="ILAsm" Value=".class nested public sequential ansi serializable sealed beforefieldinit Dictionary`2/KeyCollection/Enumerator<TKey, TValue> extends System.ValueType implements class System.Collections.Generic.IEnumerator`1<!TKey>, class System.Collections.IEnumerator, class System.IDisposable" FrameworkAlternate="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" />
<TypeSignature Language="F#" Value="type Dictionary<'Key, 'Value>.KeyCollection.Enumerator = struct
 interface IEnumerator<'Key>
 interface IDisposable
 interface IEnumerator" FrameworkAlternate="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" />
<AssemblyInfo>
<AssemblyName>System.Collections</AssemblyName>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.10.0</AssemblyVersion>
<AssemblyVersion>4.1.0.0</AssemblyVersion>
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<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
<AssemblyVersion>10.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>mscorlib</AssemblyName>
<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>
<TypeForwardingChain>
<TypeForwarding From="mscorlib" FromVersion="4.0.0.0" To="System.Collections" ToVersion="0.0.0.0" FrameworkAlternate="dotnet-uwp-10.0" />
<TypeForwarding From="netstandard" FromVersion="2.1.0.0" To="System.Collections" ToVersion="10.0.0.0" FrameworkAlternate="net-10.0" />
<TypeForwarding From="netstandard" FromVersion="2.1.0.0" To="System.Collections" ToVersion="5.0.0.0" FrameworkAlternate="net-5.0" />
<TypeForwarding From="netstandard" FromVersion="2.1.0.0" To="System.Collections" ToVersion="6.0.0.0" FrameworkAlternate="net-6.0" />
<TypeForwarding From="netstandard" FromVersion="2.1.0.0" To="System.Collections" ToVersion="7.0.0.0" FrameworkAlternate="net-7.0" />
<TypeForwarding From="netstandard" FromVersion="2.1.0.0" To="System.Collections" ToVersion="8.0.0.0" FrameworkAlternate="net-8.0" />
<TypeForwarding From="netstandard" FromVersion="2.1.0.0" To="System.Collections" ToVersion="9.0.0.0" FrameworkAlternate="net-9.0" />
</TypeForwardingChain>
<TypeParameters>
<TypeParameter Name="TKey" />
<TypeParameter Name="TValue">
<Attributes>
<Attribute FrameworkAlternate="net-10.0;net-8.0;net-9.0">
<AttributeName Language="C#">[System.Runtime.CompilerServices.Nullable(2)]</AttributeName>
<AttributeName Language="F#">[<System.Runtime.CompilerServices.Nullable(2)>]</AttributeName>
</Attribute>
</Attributes>
</TypeParameter>
</TypeParameters>
<Base>
<BaseTypeName>System.ValueType</BaseTypeName>
</Base>
<Interfaces>
<Interface>
<InterfaceName>System.Collections.Generic.IEnumerator<TKey></InterfaceName>
</Interface>
<Interface>
<InterfaceName>System.Collections.IEnumerator</InterfaceName>
</Interface>
<Interface>
<InterfaceName>System.IDisposable</InterfaceName>
</Interface>
</Interfaces>
<Attributes>
<Attribute FrameworkAlternate="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">
<AttributeName Language="C#">[System.Serializable]</AttributeName>
<AttributeName Language="F#">[<System.Serializable>]</AttributeName>
</Attribute>
</Attributes>
<Docs>
<summary>Enumerates the elements of a <see cref="T:System.Collections.Generic.Dictionary`2.KeyCollection" />.</summary>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The `foreach` statement of the C# language (`for each` in C++, `For Each` in Visual Basic) hides the complexity of enumerators. Therefore, using `foreach` is recommended, instead of directly manipulating the enumerator.
Enumerators can be used to read the data in the collection, but they cannot be used to modify the underlying collection.
Initially, the enumerator is positioned before the first element in the collection. At this position, <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.Current%2A> is undefined. You must call <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.MoveNext%2A> to advance the enumerator to the first element of the collection before reading the value of <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.Current%2A>.
<xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.Current%2A> returns the same object until <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.MoveNext%2A> is called. <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.MoveNext%2A> sets <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.Current%2A> to the next element.
If <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.MoveNext%2A> passes the end of the collection, the enumerator is positioned after the last element in the collection and <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.MoveNext%2A> returns `false`. When the enumerator is at this position, subsequent calls to <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.MoveNext%2A> also return `false`. If the last call to <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.MoveNext%2A> returned `false`, <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.Current%2A> is undefined. You cannot set <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.Current%2A> to the first element of the collection again; you must create a new enumerator instance instead.
An enumerator remains valid as long as the collection remains unchanged. If changes are made to the collection, such as adding elements or changing the capacity, the enumerator is irrecoverably invalidated and the next call to <xref:System.Collections.Generic.Dictionary%602.Enumerator.MoveNext%2A> or <xref:System.Collections.Generic.Dictionary%602.Enumerator.System%23Collections%23IEnumerator%23Reset%2A> throws an <xref:System.InvalidOperationException>.
.NET Core 3.0+ only: The only mutating methods which do not invalidate enumerators are <xref:System.Collections.Generic.Dictionary%602.Remove%2A> and <xref:System.Collections.Generic.Dictionary%602.Clear%2A>.
The enumerator does not have exclusive access to the collection; therefore, enumerating through a collection is intrinsically not a thread-safe procedure. To guarantee thread safety during enumeration, you can lock the collection during the entire enumeration. To allow the collection to be accessed by multiple threads for reading and writing, you must implement your own synchronization.
Default implementations of collections in <xref:System.Collections.Generic?displayProperty=nameWithType> are not synchronized.
]]></format>
</remarks>
<altmember cref="T:System.Collections.Generic.Dictionary`2.Enumerator" />
<altmember cref="T:System.Collections.Generic.Dictionary`2.ValueCollection.Enumerator" />
<altmember cref="T:System.Collections.Generic.IEnumerable`1" />
<altmember cref="T:System.Collections.Generic.IEnumerator`1" />
</Docs>
<Members>
<Member MemberName="Current">
<MemberSignature Language="C#" Value="public TKey Current { get; }" />
<MemberSignature Language="ILAsm" Value=".property instance !TKey Current" />
<MemberSignature Language="DocId" Value="P:System.Collections.Generic.Dictionary`2.KeyCollection.Enumerator.Current" />
<MemberSignature Language="VB.NET" Value="Public ReadOnly Property Current As TKey" />
<MemberSignature Language="F#" Value="member this.Current : 'Key" Usage="System.Collections.Generic.Dictionary<'Key, 'Value>.KeyCollection.Enumerator.Current" />
<MemberSignature Language="C++ CLI" Value="public:
 property TKey Current { TKey get(); };" />
<MemberType>Property</MemberType>
<Implements>
<InterfaceMember>P:System.Collections.Generic.IEnumerator`1.Current</InterfaceMember>
</Implements>
<AssemblyInfo>
<AssemblyName>System.Collections</AssemblyName>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.10.0</AssemblyVersion>
<AssemblyVersion>4.1.0.0</AssemblyVersion>
<AssemblyVersion>4.1.1.0</AssemblyVersion>
<AssemblyVersion>4.1.2.0</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>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>mscorlib</AssemblyName>
<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>
<Attributes>
<Attribute FrameworkAlternate="net-10.0;net-8.0;net-9.0">
<AttributeName Language="C#">[System.Runtime.CompilerServices.Nullable(1)]</AttributeName>
<AttributeName Language="F#">[<System.Runtime.CompilerServices.Nullable(1)>]</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>TKey</ReturnType>
</ReturnValue>
<Docs>
<summary>Gets the element at the current position of the enumerator.</summary>
<value>The element in the <see cref="T:System.Collections.Generic.Dictionary`2.KeyCollection" /> at the current position of the enumerator.</value>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
<xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.Current%2A> is undefined under any of the following conditions:
- The enumerator is positioned before the first element of the collection. That happens after an enumerator is created or after the <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.System%23Collections%23IEnumerator%23Reset%2A> method is called. The <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.MoveNext%2A> method must be called to advance the enumerator to the first element of the collection before reading the value of the <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.Current%2A> property.
- The last call to <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.MoveNext%2A> returned `false`, which indicates the end of the collection and that the enumerator is positioned after the last element of the collection.
- The enumerator is invalidated due to changes made in the collection, such as adding, modifying, or deleting elements.
<xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.Current%2A> does not move the position of the enumerator, and consecutive calls to <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.Current%2A> return the same object until either <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.MoveNext%2A> or <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.System%23Collections%23IEnumerator%23Reset%2A> is called.
]]></format>
</remarks>
<altmember cref="M:System.Collections.Generic.Dictionary`2.KeyCollection.Enumerator.MoveNext" />
<altmember cref="T:System.Collections.IEnumerator" />
</Docs>
</Member>
<Member MemberName="Dispose">
<MemberSignature Language="C#" Value="public void Dispose ();" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig newslot virtual instance void Dispose() cil managed" />
<MemberSignature Language="DocId" Value="M:System.Collections.Generic.Dictionary`2.KeyCollection.Enumerator.Dispose" />
<MemberSignature Language="VB.NET" Value="Public Sub Dispose ()" />
<MemberSignature Language="F#" Value="abstract member Dispose : unit -> unit
override this.Dispose : unit -> unit" Usage="enumerator.Dispose " />
<MemberSignature Language="C++ CLI" Value="public:
 virtual void Dispose();" />
<MemberType>Method</MemberType>
<Implements>
<InterfaceMember>M:System.IDisposable.Dispose</InterfaceMember>
</Implements>
<AssemblyInfo>
<AssemblyName>System.Collections</AssemblyName>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.10.0</AssemblyVersion>
<AssemblyVersion>4.1.0.0</AssemblyVersion>
<AssemblyVersion>4.1.1.0</AssemblyVersion>
<AssemblyVersion>4.1.2.0</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>
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<AssemblyVersion>10.0.0.0</AssemblyVersion>
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<AssemblyInfo>
<AssemblyName>mscorlib</AssemblyName>
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</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Void</ReturnType>
</ReturnValue>
<Parameters />
<Docs>
<summary>Releases all resources used by the <see cref="T:System.Collections.Generic.Dictionary`2.KeyCollection.Enumerator" />.</summary>
<remarks>To be added</remarks>
<altmember cref="M:System.IDisposable.Dispose" />
<altmember cref="M:System.Object.Finalize" />
<related type="Article" href="/dotnet/standard/garbage-collection/unmanaged">Cleaning Up Unmanaged Resources</related>
</Docs>
</Member>
<Member MemberName="MoveNext">
<MemberSignature Language="C#" Value="public bool MoveNext ();" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig newslot virtual instance bool MoveNext() cil managed" />
<MemberSignature Language="DocId" Value="M:System.Collections.Generic.Dictionary`2.KeyCollection.Enumerator.MoveNext" />
<MemberSignature Language="VB.NET" Value="Public Function MoveNext () As Boolean" />
<MemberSignature Language="F#" Value="abstract member MoveNext : unit -> bool
override this.MoveNext : unit -> bool" Usage="enumerator.MoveNext " />
<MemberSignature Language="C++ CLI" Value="public:
 virtual bool MoveNext();" />
<MemberType>Method</MemberType>
<Implements>
<InterfaceMember>M:System.Collections.IEnumerator.MoveNext</InterfaceMember>
</Implements>
<AssemblyInfo>
<AssemblyName>System.Collections</AssemblyName>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.10.0</AssemblyVersion>
<AssemblyVersion>4.1.0.0</AssemblyVersion>
<AssemblyVersion>4.1.1.0</AssemblyVersion>
<AssemblyVersion>4.1.2.0</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>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>mscorlib</AssemblyName>
<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>
<Parameters />
<Docs>
<summary>Advances the enumerator to the next element of the <see cref="T:System.Collections.Generic.Dictionary`2.KeyCollection" />.</summary>
<returns>
<see langword="true" /> if the enumerator was successfully advanced to the next element; <see langword="false" /> if the enumerator has passed the end of the collection.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
After an enumerator is created, the enumerator is positioned before the first element in the collection, and the first call to <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.MoveNext%2A> advances the enumerator to the first element of the collection.
If <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.MoveNext%2A> passes the end of the collection, the enumerator is positioned after the last element in the collection and <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.MoveNext%2A> returns `false`. When the enumerator is at this position, subsequent calls to <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.MoveNext%2A> also return `false`.
An enumerator remains valid as long as the collection remains unchanged. If changes are made to the collection, such as adding elements or changing the capacity, the enumerator is irrecoverably invalidated and the next call to <xref:System.Collections.Generic.Dictionary%602.Enumerator.MoveNext%2A> or <xref:System.Collections.Generic.Dictionary%602.Enumerator.System%23Collections%23IEnumerator%23Reset%2A> throws an <xref:System.InvalidOperationException>.
.NET Core 3.0+ only: The only mutating methods which do not invalidate enumerators are <xref:System.Collections.Generic.Dictionary%602.Remove%2A> and <xref:System.Collections.Generic.Dictionary%602.Clear%2A>.
]]></format>
</remarks>
<exception cref="T:System.InvalidOperationException">The collection was modified after the enumerator was created.</exception>
<altmember cref="P:System.Collections.Generic.Dictionary`2.KeyCollection.Enumerator.Current" />
</Docs>
</Member>
<Member MemberName="System.Collections.IEnumerator.Current">
<MemberSignature Language="C#" Value="object System.Collections.IEnumerator.Current { get; }" FrameworkAlternate="dotnet-uwp-10.0;netcore-1.0;netcore-1.1;netcore-2.0;netcore-2.1;netcore-2.2;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-1.6;netstandard-2.0;netstandard-2.1" />
<MemberSignature Language="ILAsm" Value=".property instance object System.Collections.IEnumerator.Current" />
<MemberSignature Language="DocId" Value="P:System.Collections.Generic.Dictionary`2.KeyCollection.Enumerator.System#Collections#IEnumerator#Current" />
<MemberSignature Language="VB.NET" Value=" ReadOnly Property Current As Object Implements IEnumerator.Current" />
<MemberSignature Language="F#" Value="member this.System.Collections.IEnumerator.Current : obj" Usage="System.Collections.IEnumerator.Current" />
<MemberSignature Language="C++ CLI" Value="property System::Object ^ System::Collections::IEnumerator::Current { System::Object ^ get(); };" />
<MemberSignature Language="C#" Value="object? System.Collections.IEnumerator.Current { get; }" FrameworkAlternate="net-10.0;net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-3.0;netcore-3.1" />
<MemberType>Property</MemberType>
<Implements>
<InterfaceMember>P:System.Collections.IEnumerator.Current</InterfaceMember>
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<AssemblyInfo>
<AssemblyName>System.Collections</AssemblyName>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
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<AssemblyInfo>
<AssemblyName>mscorlib</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
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<AssemblyName>netstandard</AssemblyName>
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<AssemblyVersion>2.1.0.0</AssemblyVersion>
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<Attributes>
<Attribute FrameworkAlternate="net-10.0;net-8.0;net-9.0">
<AttributeName Language="C#">[System.Runtime.CompilerServices.Nullable(2)]</AttributeName>
<AttributeName Language="F#">[<System.Runtime.CompilerServices.Nullable(2)>]</AttributeName>
</Attribute>
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<ReturnValue>
<ReturnType>System.Object</ReturnType>
</ReturnValue>
<Docs>
<summary>Gets the element at the current position of the enumerator.</summary>
<value>The element in the collection at the current position of the enumerator.</value>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
<xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.System%23Collections%23IEnumerator%23Current%2A> is undefined under any of the following conditions:
- The enumerator is positioned before the first element of the collection. That happens after an enumerator is created or after the <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.System%23Collections%23IEnumerator%23Reset%2A> method is called. The <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.MoveNext%2A> method must be called to advance the enumerator to the first element of the collection before reading the value of the <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.System%23Collections%23IEnumerator%23Current%2A> property.
- The last call to <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.MoveNext%2A> returned `false`, which indicates the end of the collection and that the enumerator is positioned after the last element of the collection.
- The enumerator is invalidated due to changes made in the collection, such as adding, modifying, or deleting elements.
<xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.System%23Collections%23IEnumerator%23Current%2A> does not move the position of the enumerator, and consecutive calls to <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.System%23Collections%23IEnumerator%23Current%2A> return the same object until either <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.MoveNext%2A> or <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.System%23Collections%23IEnumerator%23Reset%2A> is called.
]]></format>
</remarks>
<altmember cref="P:System.Collections.IEnumerator.Current" />
<altmember cref="M:System.Collections.IEnumerator.MoveNext" />
<altmember cref="M:System.Collections.IEnumerator.Reset" />
<altmember cref="T:System.Collections.IEnumerator" />
<exception cref="T:System.InvalidOperationException">The enumerator is positioned before the first element of the collection or after the last element. </exception>
</Docs>
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<Member MemberName="System.Collections.IEnumerator.Reset">
<MemberSignature Language="C#" Value="void IEnumerator.Reset ();" />
<MemberSignature Language="ILAsm" Value=".method hidebysig newslot virtual instance void System.Collections.IEnumerator.Reset() cil managed" />
<MemberSignature Language="DocId" Value="M:System.Collections.Generic.Dictionary`2.KeyCollection.Enumerator.System#Collections#IEnumerator#Reset" />
<MemberSignature Language="VB.NET" Value="Sub Reset () Implements IEnumerator.Reset" />
<MemberSignature Language="F#" Value="abstract member System.Collections.IEnumerator.Reset : unit -> unit
override this.System.Collections.IEnumerator.Reset : unit -> unit" Usage="enumerator.System.Collections.IEnumerator.Reset " />
<MemberSignature Language="C++ CLI" Value=" virtual void System.Collections.IEnumerator.Reset() = System::Collections::IEnumerator::Reset;" />
<MemberType>Method</MemberType>
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<InterfaceMember>M:System.Collections.IEnumerator.Reset</InterfaceMember>
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<AssemblyName>System.Collections</AssemblyName>
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<AssemblyName>netstandard</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>2.1.0.0</AssemblyVersion>
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<ReturnValue>
<ReturnType>System.Void</ReturnType>
</ReturnValue>
<Parameters />
<Docs>
<summary>Sets the enumerator to its initial position, which is before the first element in the collection.</summary>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
After calling the <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.System%23Collections%23IEnumerator%23Reset%2A> method, you must call the <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.MoveNext%2A> method to advance the enumerator to the first element of the collection before reading the value of the <xref:System.Collections.Generic.Dictionary%602.KeyCollection.Enumerator.Current%2A> property.
An enumerator remains valid as long as the collection remains unchanged. If changes are made to the collection, such as adding elements or changing the capacity, the enumerator is irrecoverably invalidated and the next call to <xref:System.Collections.Generic.Dictionary%602.Enumerator.MoveNext%2A> or <xref:System.Collections.Generic.Dictionary%602.Enumerator.System%23Collections%23IEnumerator%23Reset%2A> throws an <xref:System.InvalidOperationException>.
.NET Core 3.0+ only: The only mutating methods which do not invalidate enumerators are <xref:System.Collections.Generic.Dictionary%602.Remove%2A> and <xref:System.Collections.Generic.Dictionary%602.Clear%2A>.
]]></format>
</remarks>
<exception cref="T:System.InvalidOperationException">The collection was modified after the enumerator was created.</exception>
<altmember cref="P:System.Collections.IEnumerator.Current" />
<altmember cref="M:System.Collections.IEnumerator.MoveNext" />
<altmember cref="M:System.Collections.IEnumerator.Reset" />
<altmember cref="T:System.Collections.IEnumerator" />
</Docs>
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</Type>