How to perform SUM operation in Entity Framework
<p>I have a table.</p>

<pre><code>create table tblCartItem(
pkCartItemId int primary key identity,
CartId int not null,
ProductId int not null,
Quantity int not null,
Price nvarchar(15)
)
</code></pre>

<p>and I want to perform sum opeartion on that like as </p>

<pre><code>Select SUM(Price) from tblCartItem where CartId='107'
</code></pre>

<p>and I am trying to following code but its not working</p>

<pre><code>ObjTempCart.CartTotal = (from c in db.tblCartItems where c.CartId == cartId select c.Price).Sum();
</code></pre>

<p>Any one help me to do this using Entity Framework.
I am using MVC 4 Razor.</p>