/
HttpRequestCachePolicy.xml
786 lines (699 loc) · 47.1 KB
/
HttpRequestCachePolicy.xml
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<Type Name="HttpRequestCachePolicy" FullName="System.Net.Cache.HttpRequestCachePolicy">
<TypeSignature Language="C#" Value="public class HttpRequestCachePolicy : System.Net.Cache.RequestCachePolicy" />
<TypeSignature Language="ILAsm" Value=".class public auto ansi beforefieldinit HttpRequestCachePolicy extends System.Net.Cache.RequestCachePolicy" />
<TypeSignature Language="DocId" Value="T:System.Net.Cache.HttpRequestCachePolicy" />
<TypeSignature Language="VB.NET" Value="Public Class HttpRequestCachePolicy
Inherits RequestCachePolicy" />
<TypeSignature Language="F#" Value="type HttpRequestCachePolicy = class
 inherit RequestCachePolicy" />
<TypeSignature Language="C++ CLI" Value="public ref class HttpRequestCachePolicy : System::Net::Cache::RequestCachePolicy" />
<AssemblyInfo>
<AssemblyName>System</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>
<AssemblyInfo>
<AssemblyName>System.Net.Requests</AssemblyName>
<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>
</AssemblyInfo>
<TypeForwardingChain>
<TypeForwarding From="netstandard" FromVersion="2.1.0.0" To="System.Net.Requests" ToVersion="5.0.0.0" FrameworkAlternate="net-5.0" />
<TypeForwarding From="netstandard" FromVersion="2.1.0.0" To="System.Net.Requests" ToVersion="6.0.0.0" FrameworkAlternate="net-6.0" />
<TypeForwarding From="netstandard" FromVersion="2.1.0.0" To="System.Net.Requests" ToVersion="7.0.0.0" FrameworkAlternate="net-7.0" />
<TypeForwarding From="netstandard" FromVersion="2.1.0.0" To="System.Net.Requests" ToVersion="8.0.0.0" FrameworkAlternate="net-8.0" />
<TypeForwarding From="netstandard" FromVersion="2.1.0.0" To="System.Net.Requests" ToVersion="9.0.0.0" FrameworkAlternate="net-9.0" />
</TypeForwardingChain>
<Base>
<BaseTypeName>System.Net.Cache.RequestCachePolicy</BaseTypeName>
</Base>
<Interfaces />
<Docs>
<summary>Defines an application's caching requirements for resources obtained by using <see cref="T:System.Net.HttpWebRequest" /> objects.</summary>
<remarks>
<format type="text/markdown"><.
You can specify the cache policy for an individual request by using the <xref:System.Net.WebRequest.CachePolicy%2A> property.
Caching for Web services is not supported.
## Examples
The following code example creates a default cache policy for the application domain, and overrides it for a request.
:::code language="cpp" source="~/snippets/cpp/VS_Snippets_Remoting/NCLSimpleCache/CPP/NCLSimpleCache.cpp" id="Snippet2":::
:::code language="csharp" source="~/snippets/csharp/System.Net/WebRequest/CachePolicy/example.cs" id="Snippet2":::
]]></format>
</remarks>
<related type="Article" href="/dotnet/framework/network-programming/cache-management-for-network-applications">Cache Management for Network Applications</related>
</Docs>
<Members>
<MemberGroup MemberName=".ctor">
<AssemblyInfo>
<AssemblyName>System</AssemblyName>
<AssemblyVersion>2.0.5.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Docs>
<summary>Initializes a new instance of the <see cref="T:System.Net.Cache.HttpRequestCachePolicy" /> class.</summary>
</Docs>
</MemberGroup>
<Member MemberName=".ctor">
<MemberSignature Language="C#" Value="public HttpRequestCachePolicy ();" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig specialname rtspecialname instance void .ctor() cil managed" />
<MemberSignature Language="DocId" Value="M:System.Net.Cache.HttpRequestCachePolicy.#ctor" />
<MemberSignature Language="VB.NET" Value="Public Sub New ()" />
<MemberSignature Language="C++ CLI" Value="public:
 HttpRequestCachePolicy();" />
<MemberType>Constructor</MemberType>
<AssemblyInfo>
<AssemblyName>System</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>
<AssemblyInfo>
<AssemblyName>System.Net.Requests</AssemblyName>
<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>
</AssemblyInfo>
<Attributes>
<Attribute FrameworkAlternate="netframework-4.0">
<AttributeName Language="C#">[System.Runtime.TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")]</AttributeName>
<AttributeName Language="F#">[<System.Runtime.TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")>]</AttributeName>
</Attribute>
</Attributes>
<Parameters />
<Docs>
<summary>Initializes a new instance of the <see cref="T:System.Net.Cache.HttpRequestCachePolicy" /> class.</summary>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
This constructor initializes the <xref:System.Net.Cache.HttpRequestCachePolicy.Level%2A> property to <xref:System.Net.Cache.HttpRequestCacheLevel.Default>.
## Examples
The following code example demonstrates setting the cache policy using this constructor.
:::code language="cpp" source="~/snippets/cpp/VS_Snippets_Remoting/NCLSimpleCache/CPP/NCLSimpleCache.cpp" id="Snippet11":::
:::code language="csharp" source="~/snippets/csharp/System.Net/WebRequest/CachePolicy/example.cs" id="Snippet11":::
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName=".ctor">
<MemberSignature Language="C#" Value="public HttpRequestCachePolicy (DateTime cacheSyncDate);" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig specialname rtspecialname instance void .ctor(valuetype System.DateTime cacheSyncDate) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Net.Cache.HttpRequestCachePolicy.#ctor(System.DateTime)" />
<MemberSignature Language="VB.NET" Value="Public Sub New (cacheSyncDate As DateTime)" />
<MemberSignature Language="F#" Value="new System.Net.Cache.HttpRequestCachePolicy : DateTime -> System.Net.Cache.HttpRequestCachePolicy" Usage="new System.Net.Cache.HttpRequestCachePolicy cacheSyncDate" />
<MemberSignature Language="C++ CLI" Value="public:
 HttpRequestCachePolicy(DateTime cacheSyncDate);" />
<MemberType>Constructor</MemberType>
<AssemblyInfo>
<AssemblyName>System</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>
<AssemblyInfo>
<AssemblyName>System.Net.Requests</AssemblyName>
<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>
</AssemblyInfo>
<Parameters>
<Parameter Name="cacheSyncDate" Type="System.DateTime" />
</Parameters>
<Docs>
<param name="cacheSyncDate">A <see cref="T:System.DateTime" /> object that specifies the time when resources stored in the cache must be revalidated.</param>
<summary>Initializes a new instance of the <see cref="T:System.Net.Cache.HttpRequestCachePolicy" /> class using the specified cache synchronization date.</summary>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The cache synchronization date allows you to specify an absolute date when cached contents must be revalidated. If the cache entry was last revalidated prior to the cache synchronization date, revalidation with the server occurs. If the cache entry was revalidated after the cache synchronization date and there are no server revalidation requirements that make the cached entry invalid, the entry from the cache is used. If the cache synchronization date is set to a future date, the entry is revalidated every time it is requested, until the cache synchronization date passes.
This constructor initializes the <xref:System.Net.Cache.HttpRequestCachePolicy.Level%2A> property to <xref:System.Net.Cache.HttpRequestCacheLevel.Default>. The <xref:System.Net.Cache.HttpRequestCachePolicy.CacheSyncDate%2A> property is initialized to `cacheSyncDate`.
## Examples
The following code example demonstrates creating a cache policy based on a cache synchronization date.
:::code language="cpp" source="~/snippets/cpp/VS_Snippets_Remoting/NCLSimpleCache/CPP/NCLSimpleCache.cpp" id="Snippet3":::
:::code language="csharp" source="~/snippets/csharp/System.Net/WebRequest/CachePolicy/example.cs" id="Snippet3":::
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName=".ctor">
<MemberSignature Language="C#" Value="public HttpRequestCachePolicy (System.Net.Cache.HttpRequestCacheLevel level);" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig specialname rtspecialname instance void .ctor(valuetype System.Net.Cache.HttpRequestCacheLevel level) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Net.Cache.HttpRequestCachePolicy.#ctor(System.Net.Cache.HttpRequestCacheLevel)" />
<MemberSignature Language="VB.NET" Value="Public Sub New (level As HttpRequestCacheLevel)" />
<MemberSignature Language="F#" Value="new System.Net.Cache.HttpRequestCachePolicy : System.Net.Cache.HttpRequestCacheLevel -> System.Net.Cache.HttpRequestCachePolicy" Usage="new System.Net.Cache.HttpRequestCachePolicy level" />
<MemberSignature Language="C++ CLI" Value="public:
 HttpRequestCachePolicy(System::Net::Cache::HttpRequestCacheLevel level);" />
<MemberType>Constructor</MemberType>
<AssemblyInfo>
<AssemblyName>System</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>
<AssemblyInfo>
<AssemblyName>System.Net.Requests</AssemblyName>
<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>
</AssemblyInfo>
<Parameters>
<Parameter Name="level" Type="System.Net.Cache.HttpRequestCacheLevel" />
</Parameters>
<Docs>
<param name="level">An <see cref="T:System.Net.Cache.HttpRequestCacheLevel" /> value.</param>
<summary>Initializes a new instance of the <see cref="T:System.Net.Cache.HttpRequestCachePolicy" /> class using the specified cache policy.</summary>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
This constructor initializes the <xref:System.Net.Cache.HttpRequestCachePolicy.Level%2A> property to `level`.
The <xref:System.Net.Cache.HttpRequestCacheLevel> value controls whether caching is enabled, and when the cache can be used. For additional information, see the <xref:System.Net.Cache.HttpRequestCacheLevel> documentation.
## Examples
The following code example demonstrates creating a cache policy that allows resources found in the cache to be used from the cache.
:::code language="cpp" source="~/snippets/cpp/VS_Snippets_Remoting/NCLSimpleCache/CPP/NCLSimpleCache.cpp" id="Snippet12":::
:::code language="csharp" source="~/snippets/csharp/System.Net/WebRequest/CachePolicy/example.cs" id="Snippet12":::
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName=".ctor">
<MemberSignature Language="C#" Value="public HttpRequestCachePolicy (System.Net.Cache.HttpCacheAgeControl cacheAgeControl, TimeSpan ageOrFreshOrStale);" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig specialname rtspecialname instance void .ctor(valuetype System.Net.Cache.HttpCacheAgeControl cacheAgeControl, valuetype System.TimeSpan ageOrFreshOrStale) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Net.Cache.HttpRequestCachePolicy.#ctor(System.Net.Cache.HttpCacheAgeControl,System.TimeSpan)" />
<MemberSignature Language="VB.NET" Value="Public Sub New (cacheAgeControl As HttpCacheAgeControl, ageOrFreshOrStale As TimeSpan)" />
<MemberSignature Language="F#" Value="new System.Net.Cache.HttpRequestCachePolicy : System.Net.Cache.HttpCacheAgeControl * TimeSpan -> System.Net.Cache.HttpRequestCachePolicy" Usage="new System.Net.Cache.HttpRequestCachePolicy (cacheAgeControl, ageOrFreshOrStale)" />
<MemberSignature Language="C++ CLI" Value="public:
 HttpRequestCachePolicy(System::Net::Cache::HttpCacheAgeControl cacheAgeControl, TimeSpan ageOrFreshOrStale);" />
<MemberType>Constructor</MemberType>
<AssemblyInfo>
<AssemblyName>System</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>
<AssemblyInfo>
<AssemblyName>System.Net.Requests</AssemblyName>
<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>
</AssemblyInfo>
<Parameters>
<Parameter Name="cacheAgeControl" Type="System.Net.Cache.HttpCacheAgeControl" />
<Parameter Name="ageOrFreshOrStale" Type="System.TimeSpan" />
</Parameters>
<Docs>
<param name="cacheAgeControl">One of the following <see cref="T:System.Net.Cache.HttpCacheAgeControl" /> enumeration values: <see cref="F:System.Net.Cache.HttpCacheAgeControl.MaxAge" />, <see cref="F:System.Net.Cache.HttpCacheAgeControl.MaxStale" />, or <see cref="F:System.Net.Cache.HttpCacheAgeControl.MinFresh" />.</param>
<param name="ageOrFreshOrStale">A <see cref="T:System.TimeSpan" /> value that specifies an amount of time.</param>
<summary>Initializes a new instance of the <see cref="T:System.Net.Cache.HttpRequestCachePolicy" /> class using the specified age control and time values.</summary>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The `cacheAgeControl` value defines the meaning of the `ageOrFreshOrStale` parameter value and is used to set the associated property. For example, when you specify <xref:System.Net.Cache.HttpCacheAgeControl.MaxStale>, the <xref:System.Net.Cache.HttpRequestCachePolicy.MaxStale%2A> property is set to the value of the `ageOrFreshOrStale` parameter.
This constructor initializes the <xref:System.Net.Cache.HttpRequestCachePolicy.Level%2A> property to <xref:System.Net.Cache.HttpRequestCacheLevel.Default>.
## Examples
The following code example demonstrates creating a cache policy based on minimum freshness.
:::code language="cpp" source="~/snippets/cpp/VS_Snippets_Remoting/NCLSimpleCache/CPP/NCLSimpleCache.cpp" id="Snippet5":::
:::code language="csharp" source="~/snippets/csharp/System.Net/WebRequest/CachePolicy/example.cs" id="Snippet5":::
]]></format>
</remarks>
<exception cref="T:System.ArgumentException">The value specified for the <paramref name="cacheAgeControl" /> parameter cannot be used with this constructor.</exception>
</Docs>
</Member>
<Member MemberName=".ctor">
<MemberSignature Language="C#" Value="public HttpRequestCachePolicy (System.Net.Cache.HttpCacheAgeControl cacheAgeControl, TimeSpan maxAge, TimeSpan freshOrStale);" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig specialname rtspecialname instance void .ctor(valuetype System.Net.Cache.HttpCacheAgeControl cacheAgeControl, valuetype System.TimeSpan maxAge, valuetype System.TimeSpan freshOrStale) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Net.Cache.HttpRequestCachePolicy.#ctor(System.Net.Cache.HttpCacheAgeControl,System.TimeSpan,System.TimeSpan)" />
<MemberSignature Language="VB.NET" Value="Public Sub New (cacheAgeControl As HttpCacheAgeControl, maxAge As TimeSpan, freshOrStale As TimeSpan)" />
<MemberSignature Language="F#" Value="new System.Net.Cache.HttpRequestCachePolicy : System.Net.Cache.HttpCacheAgeControl * TimeSpan * TimeSpan -> System.Net.Cache.HttpRequestCachePolicy" Usage="new System.Net.Cache.HttpRequestCachePolicy (cacheAgeControl, maxAge, freshOrStale)" />
<MemberSignature Language="C++ CLI" Value="public:
 HttpRequestCachePolicy(System::Net::Cache::HttpCacheAgeControl cacheAgeControl, TimeSpan maxAge, TimeSpan freshOrStale);" />
<MemberType>Constructor</MemberType>
<AssemblyInfo>
<AssemblyName>System</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>2.0.5.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
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<AssemblyInfo>
<AssemblyName>netstandard</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>2.1.0.0</AssemblyVersion>
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<AssemblyName>System.Net.Requests</AssemblyName>
<AssemblyVersion>4.1.0.0</AssemblyVersion>
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<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>
</AssemblyInfo>
<Parameters>
<Parameter Name="cacheAgeControl" Type="System.Net.Cache.HttpCacheAgeControl" />
<Parameter Name="maxAge" Type="System.TimeSpan" />
<Parameter Name="freshOrStale" Type="System.TimeSpan" />
</Parameters>
<Docs>
<param name="cacheAgeControl">An <see cref="T:System.Net.Cache.HttpCacheAgeControl" /> value.</param>
<param name="maxAge">A <see cref="T:System.TimeSpan" /> value that specifies the maximum age for resources.</param>
<param name="freshOrStale">A <see cref="T:System.TimeSpan" /> value that specifies an amount of time.</param>
<summary>Initializes a new instance of the <see cref="T:System.Net.Cache.HttpRequestCachePolicy" /> class using the specified maximum age, age control value, and time value.</summary>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The `cacheAgeControl` value is used to interpret the meaning of the `freshOrStale` parameter value and set the associated property. For example, when you specify <xref:System.Net.Cache.HttpCacheAgeControl.MaxStale>, the <xref:System.Net.Cache.HttpRequestCachePolicy.MaxStale%2A> property is set to the value of the `freshOrStale` parameter. When you specify <xref:System.Net.Cache.HttpCacheAgeControl.MaxAgeAndMaxStale>, the <xref:System.Net.Cache.HttpRequestCachePolicy.MaxAge%2A> property is set using the value of the `maxAge` parameter and the <xref:System.Net.Cache.HttpRequestCachePolicy.MaxStale%2A> property is set using the value of the `freshOrStale` parameter.
Note that unless you specify <xref:System.Net.Cache.HttpCacheAgeControl.MaxAgeAndMaxStale> or <xref:System.Net.Cache.HttpCacheAgeControl.MaxAgeAndMinFresh>, the <xref:System.Net.Cache.HttpRequestCachePolicy.MaxAge%2A> property is not set.
This constructor initializes the <xref:System.Net.Cache.HttpRequestCachePolicy.Level%2A> property to <xref:System.Net.Cache.HttpRequestCacheLevel.Default>.
## Examples
The following code example demonstrates creating a cache policy based on minimum freshness and maximum age.
:::code language="cpp" source="~/snippets/cpp/VS_Snippets_Remoting/NCLSimpleCache/CPP/NCLSimpleCache.cpp" id="Snippet9":::
:::code language="csharp" source="~/snippets/csharp/System.Net/WebRequest/CachePolicy/example.cs" id="Snippet9":::
]]></format>
</remarks>
<exception cref="T:System.ArgumentException">The value specified for the <paramref name="cacheAgeControl" /> parameter is not valid.</exception>
</Docs>
</Member>
<Member MemberName=".ctor">
<MemberSignature Language="C#" Value="public HttpRequestCachePolicy (System.Net.Cache.HttpCacheAgeControl cacheAgeControl, TimeSpan maxAge, TimeSpan freshOrStale, DateTime cacheSyncDate);" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig specialname rtspecialname instance void .ctor(valuetype System.Net.Cache.HttpCacheAgeControl cacheAgeControl, valuetype System.TimeSpan maxAge, valuetype System.TimeSpan freshOrStale, valuetype System.DateTime cacheSyncDate) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Net.Cache.HttpRequestCachePolicy.#ctor(System.Net.Cache.HttpCacheAgeControl,System.TimeSpan,System.TimeSpan,System.DateTime)" />
<MemberSignature Language="VB.NET" Value="Public Sub New (cacheAgeControl As HttpCacheAgeControl, maxAge As TimeSpan, freshOrStale As TimeSpan, cacheSyncDate As DateTime)" />
<MemberSignature Language="F#" Value="new System.Net.Cache.HttpRequestCachePolicy : System.Net.Cache.HttpCacheAgeControl * TimeSpan * TimeSpan * DateTime -> System.Net.Cache.HttpRequestCachePolicy" Usage="new System.Net.Cache.HttpRequestCachePolicy (cacheAgeControl, maxAge, freshOrStale, cacheSyncDate)" />
<MemberSignature Language="C++ CLI" Value="public:
 HttpRequestCachePolicy(System::Net::Cache::HttpCacheAgeControl cacheAgeControl, TimeSpan maxAge, TimeSpan freshOrStale, DateTime cacheSyncDate);" />
<MemberType>Constructor</MemberType>
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<AssemblyInfo>
<AssemblyName>System.Net.Requests</AssemblyName>
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<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
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<Parameters>
<Parameter Name="cacheAgeControl" Type="System.Net.Cache.HttpCacheAgeControl" />
<Parameter Name="maxAge" Type="System.TimeSpan" />
<Parameter Name="freshOrStale" Type="System.TimeSpan" />
<Parameter Name="cacheSyncDate" Type="System.DateTime" />
</Parameters>
<Docs>
<param name="cacheAgeControl">An <see cref="T:System.Net.Cache.HttpCacheAgeControl" /> value.</param>
<param name="maxAge">A <see cref="T:System.TimeSpan" /> value that specifies the maximum age for resources.</param>
<param name="freshOrStale">A <see cref="T:System.TimeSpan" /> value that specifies an amount of time.</param>
<param name="cacheSyncDate">A <see cref="T:System.DateTime" /> object that specifies the time when resources stored in the cache must be revalidated.</param>
<summary>Initializes a new instance of the <see cref="T:System.Net.Cache.HttpRequestCachePolicy" /> class using the specified maximum age, age control value, time value, and cache synchronization date.</summary>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The `cacheAgeControl` value is used to interpret the meaning of the `freshOrStale` parameter value and set the associated property. For example, when you specify <xref:System.Net.Cache.HttpCacheAgeControl.MaxStale>, the <xref:System.Net.Cache.HttpRequestCachePolicy.MaxStale%2A> property is set to the value of the `freshOrStale` parameter. When you specify <xref:System.Net.Cache.HttpCacheAgeControl.MaxAgeAndMaxStale>, the <xref:System.Net.Cache.HttpRequestCachePolicy.MaxAge%2A> property is set using the value of the `maxAge` parameter and the <xref:System.Net.Cache.HttpRequestCachePolicy.MaxStale%2A> property is set using the value of the `freshOrStale` parameter.
Note that unless you specify <xref:System.Net.Cache.HttpCacheAgeControl.MaxAgeAndMaxStale> or <xref:System.Net.Cache.HttpCacheAgeControl.MaxAgeAndMinFresh>, the <xref:System.Net.Cache.HttpRequestCachePolicy.MaxAge%2A> property is not set.
This constructor initializes the <xref:System.Net.Cache.HttpRequestCachePolicy.CacheSyncDate%2A> property to `cacheSyncDate`, and initializes the <xref:System.Net.Cache.HttpRequestCachePolicy.Level%2A> property to <xref:System.Net.Cache.HttpRequestCacheLevel.Default>.
## Examples
The following code example demonstrates creating a cache policy based on minimum freshness, maximum age, and a cache synchronization date.
:::code language="cpp" source="~/snippets/cpp/VS_Snippets_Remoting/NCLSimpleCache/CPP/NCLSimpleCache.cpp" id="Snippet10":::
:::code language="csharp" source="~/snippets/csharp/System.Net/WebRequest/CachePolicy/example.cs" id="Snippet10":::
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName="CacheSyncDate">
<MemberSignature Language="C#" Value="public DateTime CacheSyncDate { get; }" />
<MemberSignature Language="ILAsm" Value=".property instance valuetype System.DateTime CacheSyncDate" />
<MemberSignature Language="DocId" Value="P:System.Net.Cache.HttpRequestCachePolicy.CacheSyncDate" />
<MemberSignature Language="VB.NET" Value="Public ReadOnly Property CacheSyncDate As DateTime" />
<MemberSignature Language="F#" Value="member this.CacheSyncDate : DateTime" Usage="System.Net.Cache.HttpRequestCachePolicy.CacheSyncDate" />
<MemberSignature Language="C++ CLI" Value="public:
 property DateTime CacheSyncDate { DateTime get(); };" />
<MemberType>Property</MemberType>
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<AssemblyInfo>
<AssemblyName>netstandard</AssemblyName>
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<AssemblyVersion>2.1.0.0</AssemblyVersion>
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<AssemblyName>System.Net.Requests</AssemblyName>
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<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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<ReturnValue>
<ReturnType>System.DateTime</ReturnType>
</ReturnValue>
<Docs>
<summary>Gets the cache synchronization date for this instance.</summary>
<value>A <see cref="T:System.DateTime" /> value set to the date specified when this instance was created. If no date was specified, this property's value is <see cref="F:System.DateTime.MinValue">DateTime.MinValue</see>.</value>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The cache synchronization date allows you to specify an absolute date when cached contents must be revalidated. If the cache entry was last revalidated prior to the cache synchronization date, revalidation with the server occurs. If the cache entry was revalidated after the cache synchronization date and there are no server revalidation requirements that make the cached entry invalid, the entry from the cache is used. If the cache synchronization date is set to a future date, the entry is revalidated every time it is requested, until the cache synchronization date passes.
## Examples
The following code example displays the value of this property.
:::code language="cpp" source="~/snippets/cpp/VS_Snippets_Remoting/NCLSimpleCache/CPP/NCLSimpleCache.cpp" id="Snippet3":::
:::code language="csharp" source="~/snippets/csharp/System.Net/WebRequest/CachePolicy/example.cs" id="Snippet3":::
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName="Level">
<MemberSignature Language="C#" Value="public System.Net.Cache.HttpRequestCacheLevel Level { get; }" />
<MemberSignature Language="ILAsm" Value=".property instance valuetype System.Net.Cache.HttpRequestCacheLevel Level" />
<MemberSignature Language="DocId" Value="P:System.Net.Cache.HttpRequestCachePolicy.Level" />
<MemberSignature Language="VB.NET" Value="Public ReadOnly Property Level As HttpRequestCacheLevel" />
<MemberSignature Language="F#" Value="member this.Level : System.Net.Cache.HttpRequestCacheLevel" Usage="System.Net.Cache.HttpRequestCachePolicy.Level" />
<MemberSignature Language="C++ CLI" Value="public:
 property System::Net::Cache::HttpRequestCacheLevel Level { System::Net::Cache::HttpRequestCacheLevel get(); };" />
<MemberType>Property</MemberType>
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<AssemblyName>System</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
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<AssemblyInfo>
<AssemblyName>netstandard</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
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<AssemblyName>System.Net.Requests</AssemblyName>
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<Attributes>
<Attribute FrameworkAlternate="netframework-4.0">
<AttributeName Language="C#">[get: System.Runtime.TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")]</AttributeName>
<AttributeName Language="F#">[<get: System.Runtime.TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")>]</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>System.Net.Cache.HttpRequestCacheLevel</ReturnType>
</ReturnValue>
<Docs>
<summary>Gets the <see cref="T:System.Net.Cache.HttpRequestCacheLevel" /> value that was specified when this instance was created.</summary>
<value>A <see cref="T:System.Net.Cache.HttpRequestCacheLevel" /> value that specifies the cache behavior for resources that were obtained using <see cref="T:System.Net.HttpWebRequest" /> objects.</value>
<remarks>
<format type="text/markdown"><.
## Examples
The following code example demonstrates displaying the value of this property.
:::code language="cpp" source="~/snippets/cpp/VS_Snippets_Remoting/NCLSimpleCache/CPP/NCLSimpleCache.cpp" id="Snippet11":::
:::code language="csharp" source="~/snippets/csharp/System.Net/WebRequest/CachePolicy/example.cs" id="Snippet11":::
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName="MaxAge">
<MemberSignature Language="C#" Value="public TimeSpan MaxAge { get; }" />
<MemberSignature Language="ILAsm" Value=".property instance valuetype System.TimeSpan MaxAge" />
<MemberSignature Language="DocId" Value="P:System.Net.Cache.HttpRequestCachePolicy.MaxAge" />
<MemberSignature Language="VB.NET" Value="Public ReadOnly Property MaxAge As TimeSpan" />
<MemberSignature Language="F#" Value="member this.MaxAge : TimeSpan" Usage="System.Net.Cache.HttpRequestCachePolicy.MaxAge" />
<MemberSignature Language="C++ CLI" Value="public:
 property TimeSpan MaxAge { TimeSpan get(); };" />
<MemberType>Property</MemberType>
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<AssemblyInfo>
<AssemblyName>netstandard</AssemblyName>
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<AssemblyName>System.Net.Requests</AssemblyName>
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<AssemblyVersion>9.0.0.0</AssemblyVersion>
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<Attributes>
<Attribute FrameworkAlternate="netframework-4.0">
<AttributeName Language="C#">[get: System.Runtime.TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")]</AttributeName>
<AttributeName Language="F#">[<get: System.Runtime.TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")>]</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>System.TimeSpan</ReturnType>
</ReturnValue>
<Docs>
<summary>Gets the maximum age permitted for a resource returned from the cache.</summary>
<value>A <see cref="T:System.TimeSpan" /> value that is set to the maximum age value specified when this instance was created. If no date was specified, this property's value is <see cref="F:System.DateTime.MinValue">DateTime.MinValue</see>.</value>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
If the cached copy of the resource is older than the specified time value, the resource must be revalidated. The value for this property is specified when the instance is constructed.
## Examples
The following code example demonstrates displaying the value of this property.
:::code language="cpp" source="~/snippets/cpp/VS_Snippets_Remoting/NCLSimpleCache/CPP/NCLSimpleCache.cpp" id="Snippet7":::
:::code language="csharp" source="~/snippets/csharp/System.Net/WebRequest/CachePolicy/example.cs" id="Snippet7":::
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName="MaxStale">
<MemberSignature Language="C#" Value="public TimeSpan MaxStale { get; }" />
<MemberSignature Language="ILAsm" Value=".property instance valuetype System.TimeSpan MaxStale" />
<MemberSignature Language="DocId" Value="P:System.Net.Cache.HttpRequestCachePolicy.MaxStale" />
<MemberSignature Language="VB.NET" Value="Public ReadOnly Property MaxStale As TimeSpan" />
<MemberSignature Language="F#" Value="member this.MaxStale : TimeSpan" Usage="System.Net.Cache.HttpRequestCachePolicy.MaxStale" />
<MemberSignature Language="C++ CLI" Value="public:
 property TimeSpan MaxStale { TimeSpan get(); };" />
<MemberType>Property</MemberType>
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<Attribute FrameworkAlternate="netframework-4.0">
<AttributeName Language="C#">[get: System.Runtime.TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")]</AttributeName>
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</Attribute>
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<ReturnValue>
<ReturnType>System.TimeSpan</ReturnType>
</ReturnValue>
<Docs>
<summary>Gets the maximum staleness value that is permitted for a resource returned from the cache.</summary>
<value>A <see cref="T:System.TimeSpan" /> value that is set to the maximum staleness value specified when this instance was created. If no date was specified, this property's value is <see cref="F:System.DateTime.MinValue">DateTime.MinValue</see>.</value>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
This property specifies the amount of time after content expiration during which the cached copy of the resource is acceptable. The value for this property is specified when the instance is constructed.
## Examples
The following code example demonstrates displaying the value of this property.
:::code language="cpp" source="~/snippets/cpp/VS_Snippets_Remoting/NCLSimpleCache/CPP/NCLSimpleCache.cpp" id="Snippet6":::
:::code language="csharp" source="~/snippets/csharp/System.Net/WebRequest/CachePolicy/example.cs" id="Snippet6":::
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName="MinFresh">
<MemberSignature Language="C#" Value="public TimeSpan MinFresh { get; }" />
<MemberSignature Language="ILAsm" Value=".property instance valuetype System.TimeSpan MinFresh" />
<MemberSignature Language="DocId" Value="P:System.Net.Cache.HttpRequestCachePolicy.MinFresh" />
<MemberSignature Language="VB.NET" Value="Public ReadOnly Property MinFresh As TimeSpan" />
<MemberSignature Language="F#" Value="member this.MinFresh : TimeSpan" Usage="System.Net.Cache.HttpRequestCachePolicy.MinFresh" />
<MemberSignature Language="C++ CLI" Value="public:
 property TimeSpan MinFresh { TimeSpan get(); };" />
<MemberType>Property</MemberType>
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</Attribute>
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<ReturnValue>
<ReturnType>System.TimeSpan</ReturnType>
</ReturnValue>
<Docs>
<summary>Gets the minimum freshness that is permitted for a resource returned from the cache.</summary>
<value>A <see cref="T:System.TimeSpan" /> value that specifies the minimum freshness specified when this instance was created. If no date was specified, this property's value is <see cref="F:System.DateTime.MinValue">DateTime.MinValue</see>.</value>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
This value specifies the amount of time before content expiration, during which the cached copy of the resource is acceptable. The value for this property is specified when the instance is constructed.
## Examples
The following code example demonstrates displaying the value of this property.
:::code language="cpp" source="~/snippets/cpp/VS_Snippets_Remoting/NCLSimpleCache/CPP/NCLSimpleCache.cpp" id="Snippet5":::
:::code language="csharp" source="~/snippets/csharp/System.Net/WebRequest/CachePolicy/example.cs" id="Snippet5":::
]]></format>
</remarks>
</Docs>
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<Member MemberName="ToString">
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<MemberSignature Language="ILAsm" Value=".method public hidebysig virtual instance string ToString() cil managed" />
<MemberSignature Language="DocId" Value="M:System.Net.Cache.HttpRequestCachePolicy.ToString" />
<MemberSignature Language="VB.NET" Value="Public Overrides Function ToString () As String" />
<MemberSignature Language="F#" Value="override this.ToString : unit -> string" Usage="httpRequestCachePolicy.ToString " />
<MemberSignature Language="C++ CLI" Value="public:
 override System::String ^ ToString();" />
<MemberType>Method</MemberType>
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<AttributeName Language="C#">[System.Runtime.CompilerServices.NullableContext(1)]</AttributeName>
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<ReturnValue>
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<Parameters />
<Docs>
<summary>Returns a string representation of this instance.</summary>
<returns>A <see cref="T:System.String" /> value that contains the property values for this instance.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The string contains a label that identifies the property, followed by a colon (":") and the value. Properties are separated by a single space.
## Examples
The following code example demonstrates calling this method.
:::code language="cpp" source="~/snippets/cpp/VS_Snippets_Remoting/NCLSimpleCache/CPP/NCLSimpleCache.cpp" id="Snippet1":::
:::code language="csharp" source="~/snippets/csharp/System.Net/WebRequest/CachePolicy/example.cs" id="Snippet1":::
]]></format>
</remarks>
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