asp .net v4.0 in the list of iis web server extensions.

#Asp .net v4.0 in the list of iis web server extensions. install
#Asp .net v4.0 in the list of iis web server extensions. upgrade
#Asp .net v4.0 in the list of iis web server extensions. password

You can even base it off of the existing one if you don't have the password memorized for the existing one. Simply create a new application pool and move the site that you will be upgrading to that pool. Please use the IIS Administration Tool to reconfigure your server to run the application in a separate process.'įortunately, the solution is easy enough. 'It is not possible to run two different versions of ASP.NET in the same IIS process. You will also receive Event ID 1062 in Event Viewer that says: Please review this log entry to discover what caused this error to occur. Please hit the 'Refresh' button in your web browser to retry your request.Īdministrator Note: An error message detailing the cause of this specific request failure can be found in the application event log of the web server. The web application you are attempting to access on this web server is currently unavailable. If you attempt to run multiple versions of the framework at the same time in the same process, the 2nd version that tries to run will fail with the following error: While multiple versions of the framework can co-exist on the same server, they can't co-exist in the same process. You cannot run more than one version of the framework in the same application pool in IIS6. This has the same advantages I mentioned previously, but it has one big gotcha! In IIS6, the aspnet_wp.exe process is done away with, and the work that it did is now done within each w3wp.exe process. You are now able to specify your own Identity User which can be unique per Application Pool. This brings with it a number of welcome security, performance and management advantages. Whenever a site needs to run, a w3wp.exe process will start for its application pool if it hasn't already started. A system administrator is able to create groups of sites and place each site in its own group. One key new concept is Application Pools.

#Asp .net v4.0 in the list of iis web server extensions. upgrade

IIS6 was an impressive upgrade that brought with it some new concepts. Notice that there aren't any aspnet_wp.exe processes anymore, but there are w3wp.exe processes instead. Now consider the following IIS6 (Windows Server 2003) screenshot: This allows multiple versions of the framework to live beside each other in IIS5. (v1.0, v1.1 and v2.0) If a process for a particular version of the framework doesn't exist, as soon as it's needed, a new process will be spun up. There is one per version of the framework. Notice the 3 processes called aspnet_wp.exe. Following is a snapshot of Windows Task Manager on an IIS5 (Windows 2000) server: There are a couple gotchas to consider with running multiple versions of the framework side by side.

#Asp .net v4.0 in the list of iis web server extensions. install

The install itself is quite small, for example the v2.0 download is 22MB. Simply install the framework version on your server and it will be available to you. Each site, or even a vdir (Virtual Directory) within a site can have its own version of the framework installed. Version v1.0, v1.1 and v2.0 can all run together at the same time on the same server. Microsoft has done a great job of allowing multiple versions of the framework to run side by side. But, like anything else, this brings with it a number of considerations. Like any good technology, ASP.NET continues to evolve as new versions are released.