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ObjectQuery<T>.Intersect Method

Limits the query results by including only the results that exist in another object query.

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

public ObjectQuery<T> Intersect(
	ObjectQuery<T> query


Type: System.Data.Objects.ObjectQuery<T>
An ObjectQuery<T> that represents the results to include in the query.

Return Value

Type: System.Data.Objects.ObjectQuery<T>
A new ObjectQuery<T> instance that is equivalent to the original instance with INTERSECT applied based on the specified query.


The query parameter is null or is an empty string.

The supplied query that defines results to include must be of the same type or of a type that is compatible with the ObjectQuery<T>.

Parameters that are defined in the supplied query are merged with parameters that are defined in the ObjectQuery<T> instance. Parameters must be unique in the combined ObjectParameterCollection. There cannot be two parameters in the combined collection with the same name. For more information, see Query Builder Methods (Entity Framework).

The resulting query inherits the connection from the ObjectQuery<T> instance on which the Intersect method was called.

The example in this topic is based on the Adventure Works Sales Model. This example creates a new ObjectQuery<T> object that contains the results of two other queries.

int productID1 = 900;
int productID2 = 950;
using (AdventureWorksEntities context =
    new AdventureWorksEntities())
    string queryString = @"SELECT VALUE product 
        FROM AdventureWorksEntities.Products 
        AS product WHERE product.ProductID > @productID1";

    ObjectQuery<Product> productQuery =
        new ObjectQuery<Product>(queryString,
            context, MergeOption.NoTracking);

    string queryString2 = @"SELECT VALUE product 
        FROM AdventureWorksEntities.Products 
        AS product WHERE product.ProductID > @productID2";

    ObjectQuery<Product> productQuery2 =
        new ObjectQuery<Product>(queryString2,
            context, MergeOption.NoTracking);

    ObjectQuery<Product> productQuery3 =

    productQuery3.Parameters.Add(new ObjectParameter("productID1", productID1));
    productQuery3.Parameters.Add(new ObjectParameter("productID2", productID2));

    Console.WriteLine("Result of Intersect");

    // Iterate through the collection of Product items
    // after the Intersect method was called.
    foreach (Product result in productQuery3)
        Console.WriteLine("Product Name: {0}", result.ProductID);

.NET Framework

Supported in: 4, 3.5 SP1

.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.