Update Distributed Cache Tag Helper content (#36151)

Author: guardrex

aspnetcore/mvc/views/tag-helpers/built-in/distributed-cache-tag-helper.md

@@ -4,20 +4,20 @@ author: pkellner
 description: Learn how to use the Distributed Cache Tag Helper.
 ms.author: tdykstra
 ms.custom: mvc
-ms.date: 01/24/2020
+ms.date: 09/24/2025
 uid: mvc/views/tag-helpers/builtin-th/distributed-cache-tag-helper
 ---
 # Distributed Cache Tag Helper in ASP.NET Core
 
 By [Peter Kellner](https://peterkellner.net)
 
-The Distributed Cache Tag Helper provides the ability to dramatically improve the performance of your ASP.NET Core app by caching its content to a distributed cache source.
+The Distributed Cache Tag Helper provides the ability to dramatically improve the performance of your ASP.NET Core app by caching its content to a [distributed cache source](xref:performance/caching/distributed).
 
 For an overview of Tag Helpers, see <xref:mvc/views/tag-helpers/intro>.
 
 The Distributed Cache Tag Helper inherits from the same base class as the Cache Tag Helper. All of the [Cache Tag Helper](xref:mvc/views/tag-helpers/builtin-th/cache-tag-helper) attributes are available to the Distributed Tag Helper.
 
-The Distributed Cache Tag Helper uses [constructor injection](xref:fundamentals/dependency-injection#constructor-injection-behavior). The <xref:Microsoft.Extensions.Caching.Distributed.IDistributedCache> interface is passed into the Distributed Cache Tag Helper's constructor. If no concrete implementation of `IDistributedCache` is created in `Startup.ConfigureServices` (`Startup.cs`), the Distributed Cache Tag Helper uses the same in-memory provider for storing cached data as the [Cache Tag Helper](xref:mvc/views/tag-helpers/builtin-th/cache-tag-helper).
+The Distributed Cache Tag Helper uses [constructor injection](xref:fundamentals/dependency-injection#constructor-injection-behavior). The <xref:Microsoft.Extensions.Caching.Distributed.IDistributedCache> interface is passed into the Distributed Cache Tag Helper's constructor. If no concrete implementation of <xref:Microsoft.Extensions.Caching.Distributed.IDistributedCache> is created in the `Program` file or  `Startup.ConfigureServices` (`Startup.cs`), the Distributed Cache Tag Helper uses the same in-memory provider for storing cached data as the [Cache Tag Helper](xref:mvc/views/tag-helpers/builtin-th/cache-tag-helper).
 
 ## Distributed Cache Tag Helper Attributes
 
@@ -27,13 +27,15 @@ The Distributed Cache Tag Helper uses [constructor injection](xref:fundamentals/
 * `expires-on`
 * `expires-after`
 * `expires-sliding`
+* `vary-by`
+* `vary-by-cookie`
+* `vary-by-culture`
 * `vary-by-header`
 * `vary-by-query`
 * `vary-by-route`
-* `vary-by-cookie`
 * `vary-by-user`
-* `vary-by`
-* `priority`
+
+The `expires-sliding` attribute value defaults to 30 seconds if `expires-after` and `expires-on` aren't set. Otherwise, the value defaults to 20 minutes with the SQL Server caching service.
 
 The Distributed Cache Tag Helper inherits from the same class as Cache Tag Helper. For descriptions of these attributes, see the [Cache Tag Helper](xref:mvc/views/tag-helpers/builtin-th/cache-tag-helper).
 
@@ -53,16 +55,17 @@ Example:
 </distributed-cache>
 ```
 
-## Distributed Cache Tag Helper IDistributedCache implementations
+## Distributed Cache Tag Helper `IDistributedCache` implementations
+
+There are two implementations of <xref:Microsoft.Extensions.Caching.Distributed.IDistributedCache> built in to ASP.NET Core. One is based on SQL Server, and the other is based on Redis. Third-party implementations are also available, such as [NCache](http://www.alachisoft.com/ncache/aspnet-core-idistributedcache-ncache.html). Both implementations involve setting an instance of <xref:Microsoft.Extensions.Caching.Distributed.IDistributedCache> in either the `Program` file or `Startup` class.
 
-There are two implementations of <xref:Microsoft.Extensions.Caching.Distributed.IDistributedCache> built in to ASP.NET Core. One is based on SQL Server, and the other is based on Redis. Third-party implementations are also available, such as [NCache](http://www.alachisoft.com/ncache/aspnet-core-idistributedcache-ncache.html). Details of these implementations can be found at <xref:performance/caching/distributed>. Both implementations involve setting an instance of `IDistributedCache` in `Startup`.
+There are no tag attributes specifically associated with using any implementation of <xref:Microsoft.Extensions.Caching.Distributed.IDistributedCache>.
 
-There are no tag attributes specifically associated with using any specific implementation of `IDistributedCache`.
+For more information, see <xref:performance/caching/distributed>.
 
 ## Additional resources
 
 * <xref:mvc/views/tag-helpers/builtin-th/cache-tag-helper>
 * <xref:fundamentals/dependency-injection>
-* <xref:performance/caching/distributed>
 * <xref:performance/caching/memory>
 * <xref:security/authentication/identity>