Count SQL statement generated by entity framework 4

In ADO. NET Entity Framework 4, the SQL statement generated by the LINQ to entities statement that queries the number of records actually contains subqueries.

>>> Query code using Entity Framework 4:

 using (SpaceObjectContext context = new SpaceObjectContext())
{
return context.SiteMsgs.Count(msg => msg.SenderSpaceUserId == 1);
}

>>> Generated SQL statement:

 SELECT 
[GroupBy1].[A1] AS [C1]
FROM ( SELECT 
COUNT(1) AS [A1]
FROM [dbo].[club_Message] AS [Extent1]
WHERE 1 = [Extent1].[SenderID]
)  AS [GroupBy1]

However, this problem does not exist in LINQ to SQL:

>>> Query using LINQ to SQL:

using(club_CNBlogsDataContext context = new club_CNBlogsDataContext())
{
return context.club_Messages.Count(msg => msg.SenderID == 1);
}

>>> Generated SQL statement:

 exec sp_executesql N'SELECT COUNT(*) AS [value]
FROM [dbo].[club_Message] AS [t0]
WHERE [t0].[SenderID] = @p0',N'@p0 int',@p0=1