How to add application pool on iis 7 in Asp.NET 4

For do this follow the following instructions

1) open command window in your windows 7 environment

2) type the following command

cd C:\Windows\Microsoft.NET\Framework\v4.0.30319\

3)Again type

aspnet_regiis.exe -ir

4)Close the DOS and re-open your start menu

5) right click Computer then select Manage

6)Expand Services and Applications

7)Select Internet Information Services

8)Then there have a new applet within the content window exclusively for IIS.

9)Expand out your computer and locate the Application Pools node, and select it. (You should now see ASP.NET v4.0 listed)

10)Expand out your Sites node and locate the site you want to modify (select it)

11)To the right you'll notice Basic Settings... just below the Edit Site text. Click this, and a new window should appear

12)Select the .NET 4 AppPool using the Select... button and click ok.

13)Restart the site

Thats all