linq to ef and asp.net mvc 3 [ w3wp.exe RAM issue ]
I have a website which prepared with ASP.NET MVC 3 and Entity Framework 4.1. This image below is my server's perfmon logs.

My problem is w3wp.exe is getting bigger and bigger at every minutes and never release.  I'm using Linq to EF in my queries and all my entity framework codes are in using block.

I think its a garbage collection problem but not sure. What is my problem and how can i fix it?  
Thanks a lot.

[Perfmon Logs' image about my issue](http://i.stack.imgur.com/R4fWN.gif)
linq to ef and asp.net mvc 3 [ w3wp.exe RAM issue ]
===

I have a website which prepared with ASP.NET MVC 3 and Entity Framework 4.1. This image below is my server's perfmon logs.

My problem is w3wp.exe is getting bigger and bigger at every minutes and never release.  I'm using Linq to EF in my queries and all my entity framework codes are in using block.

I think its a garbage collection problem but not sure. What is my problem and how can i fix it?  
Thanks a lot.

[Perfmon Logs' image about my issue](http://i.stack.imgur.com/R4fWN.gif)