Document shared-type entity types

Fixes #3394

entity-framework/core/modeling/entity-types.md

@@ -1,8 +1,8 @@
 ---
 title: Entity Types - EF Core
 description: How to configure and map entity types using Entity Framework Core
-author: roji
-ms.date: 10/06/2020
+author: AndriySvyryd
+ms.date: 10/25/2021
 uid: core/modeling/entity-types
 ---
 # Entity Types
@@ -159,3 +159,12 @@ You can set an arbitrary text comment that gets set on the database table, allow
 [!code-csharp[Main](../../../samples/core/Modeling/EntityTypes/FluentAPI/TableComment.cs?name=TableComment&highlight=4)]
 
 ***
+
+## Shared-type entity types
+
+> [!NOTE]
+> Support for Shared-type entity types was introduced in EF Core 5.0.
+
+Entity types that use the same CLR type are known as shared-type entity types. These entity types need to be configured with a unique name. Whenever a shared-type entity type is used the supplied name needs to be provided in addition to the CLR type. This means that the corresponding `DbSet` property must be implemented using a `Set` call.
+
+[!code-csharp[Main](../../../samples/core/Modeling/ShadowAndIndexerProperties/SharedType.cs?name=SharedType&highlight=3,7)]

entity-framework/core/modeling/shadow-properties.md

@@ -2,7 +2,7 @@
 title: Shadow and Indexer Properties - EF Core
 description: Configuring shadow and indexer properties in an Entity Framework Core model
 author: AndriySvyryd
-ms.date: 10/09/2020
+ms.date: 10/25/2021
 uid: core/modeling/shadow-properties
 ---
 # Shadow and Indexer Properties
@@ -59,6 +59,6 @@ If the name supplied to the `IndexerProperty` method matches the name of an exis
 > [!NOTE]
 > Support for Property bag entity types was introduced in EF Core 5.0.
 
-Entity types that contain only indexer properties are known as property bag entity types. These entity types don't have shadow properties, instead EF will create indexer properties. Currently only `Dictionary<string, object>` is supported as a property bag entity type. It must be configured as a shared entity type with a unique name and the corresponding `DbSet` property must be implemented using a `Set` call.
+Entity types that contain only indexer properties are known as property bag entity types. These entity types don't have shadow properties, instead EF will create indexer properties. Currently only `Dictionary<string, object>` is supported as a property bag entity type. It must be configured as a [shared-type entity type](entity-types.md#shared-type-entity-types) with a unique name and the corresponding `DbSet` property must be implemented using a `Set` call.
 
 [!code-csharp[Main](../../../samples/core/Modeling/ShadowAndIndexerProperties/SharedType.cs?name=SharedType&highlight=3,7)]