How to Find IIS Version With ASP.NET Code?

Although .Net Framework in general gives you uniform run-time environment on different operating systems, some things works differently. For example, if you try to implement URL rewriting or ASP.NET routing, code will return just an error 404 - Page Not Found on earlier versions of IIS.

To find out which version of IIS hosts your web application, you can use SERVER_SOFTWARE from Request.ServerVariables collection, with code like this:

[ C# ]

Response.Write(Request.ServerVariables["SERVER_SOFTWARE"]);

[ VB.NET ]

Response.Write(Request.ServerVariables("SERVER_SOFTWARE"))

This code line will return output with server name and version, for example:

Microsoft-IIS/6.0

Related articles:

1. How To Get Server Computer Name?

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