How to Find out the Installation is MOSS 2007 or WSS 3.0

Here is the code which identifies the Installation is MOSS 2007 or WSS 3.0

/// <summary> 
/// Method to find out if a SharePoint installation is MOSS or WSS 3.0 
/// </summary> 
public static bool IsMOSS() 
{ 

   SPFeatureDefinitionCollection features =  SPContext.Current.Site.WebApplication.Farm.FeatureDefinitions; 
    if (features["OssNavigation"] != null && features["Publishing"] != null) 
        return true; 
    else 
        return false; 
}