The Sitecore version appears on the shell Login page. Which is typcally at http://domain/sitecore/login/
![Sitecore CMS6 Version](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgBSuP2kC9Mn6p_nGQHeIoVWkYqSOh3zksBoebMs5hI7NRTvXrHgjdFpCP03EeowrkHOwGZ13aVuTFiaC2yKuvL63aN1bAhLhyphenhyphen3MPIIxZoB_pc_dAE8cFOQl3RvULMF7uy0-mt0sm6uWmdC/s320/SitecoreVersion.png)
It may also pay to check the DLL versions as the interface might be lying about the actual version.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgnAjEM0j-QpOhV_EQSn-EBf70K2VlQVQbVP8ZsGCJB4Z0qb839s2200qvczuSjNZM9BwHs5-xLX1zTaymKG0GwbCQ2vQkxADUsdiRwLJHsBp9rPnCF6-s_QRfd8Ex8rhwDjKEA2Eh9kgpC/s400/SitecoreDLLVersion.png)
From code try:
- Sitecore.Configuration.About.GetVersionNumber
- Sitecore.Configuration.About.VersionInformation
- ~/sitecore/shell/sitecore.version.xml