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ObjectContext.CreateObjectSet<TEntity> Method (String)

Creates a new ObjectSet<TEntity> instance that is used to query, add, modify, and delete objects of the specified type and with the specified entity set name.

Namespace:  System.Data.Objects
Assembly:  System.Data.Entity (in System.Data.Entity.dll)

public ObjectSet<TEntity> CreateObjectSet<TEntity>(
	string entitySetName
where TEntity : class

Type Parameters


Entity type of the requested ObjectSet<TEntity>.


Type: System.String
Name of the entity set for the returned ObjectSet<TEntity>. The string must be qualified by the default container name if the DefaultContainerName property is not set on the ObjectContext.

Return Value

Type: System.Data.Objects.ObjectSet<TEntity>
The new ObjectSet<TEntity> instance.


The EntitySet from entitySetName does not match the EntitySet of the object’s EntityKey.


The DefaultContainerName property is not set on the ObjectContext and the name is not qualified as part of the entitySetName parameter.


The specified type belongs to more than one entity set.

.NET Framework

Supported in: 4

.NET Framework Client Profile

Supported in: 4

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.