Below are some examples of a few of the changes being proposed:

Streamlined .NET Namespaces Navigation

The current MSDN Class Library lists all .NET namespaces in a flat-namespace (sorted alphabetically):

Two downsides of the above approach are:

Some of the least-used namespaces are listed first (like Microsoft.Aspnet.Snapin and Microsoft.Build.BuildEngine)

All sub-namespaces are listed, which makes the list a little overwhelming, and page-load times to be slow

The new MSDN Library Preview Site now lists “System” namespaces first (since those are the most used), and the home-page lists just top-level namespace groups – which makes it easier to find things, and enables the page to load faster:

Class overview and members pages merged into a single topic about each class

Previously you had to navigate to several different pages to find member information about types:

Links to these are still available in the MSDN Library Preview Site TOC – but the members are also now listed on the overview page, which makes it easy to quickly find everything in one place:

Commonly used things are nearer the top of the page

One of the other usability improvements with the new MSDN Library Preview Site is that common elements like “Code Examples” and “Inheritance Hierarchy” (for classes) are now listed near the top of the help page – making them easy to quickly find: