Using advWorksContext As New AdventureWorksEntities
    Try
        ' Call the constructor that takes a command string and ObjectContext.
        Dim productQuery1 As New ObjectQuery(Of Product)("Product", advWorksContext)

        Dim result As Product
        For Each result In productQuery1
            Console.WriteLine("Product Name: {0}", result.Name)
        Next

        Dim queryString As String = _
            "SELECT VALUE Product FROM AdventureWorksEntities.Product AS Product"

        ' Call the constructor with the specified query and the ObjectContext.
        Dim productQuery2 As New ObjectQuery(Of Product)(queryString, advWorksContext)

        Dim result1 As Product
        For Each result1 In productQuery2
            Console.WriteLine("Product Name: {0}", result1.Name)
        Next

        '  Call the constructor with the specified query, the ObjectContext, 
        ' and the NoTracking merge option.                
        Dim productQuery3 As New ObjectQuery(Of Product) _
            (queryString, advWorksContext, MergeOption.NoTracking)

        Dim result2 As Product
        For Each result2 In productQuery3
            Console.WriteLine("Product Name: {0}", result2.Name)
        Next
    Catch ex As EntitySqlException
        Console.WriteLine(ex.ToString)
    End Try
End Using

using (AdventureWorksEntities advWorksContext =
    new AdventureWorksEntities())
{
    try
    {
        // Call the constructor with a query for products and the ObjectContext.
        ObjectQuery<Product> productQuery1 =
            new ObjectQuery<Product>("Product", advWorksContext);

        foreach (Product result in productQuery1)
            Console.WriteLine("Product Name: {0}", result.Name);

        string queryString =
            @"SELECT VALUE Product FROM AdventureWorksEntities.Product AS Product";

        // Call the constructor with the specified query and the ObjectContext.
        ObjectQuery<Product> productQuery2 =
            new ObjectQuery<Product>(queryString, advWorksContext);

        foreach (Product result in productQuery2)
            Console.WriteLine("Product Name: {0}", result.Name);

        // Call the constructor with the specified query, the ObjectContext, 
        // and the NoTracking merge option.
        ObjectQuery<Product> productQuery3 =
            new ObjectQuery<Product>(queryString, 
                advWorksContext, MergeOption.NoTracking);

        foreach (Product result in productQuery3)
            Console.WriteLine("Product Name: {0}", result.Name);
    }
    catch (EntitySqlException ex)
    {
        Console.WriteLine(ex.ToString());
    }
}