ExDAV.ExSearcher searcher = new ExDav.ExSearcher("http://mystore.edu/myresource");

            searcher.Depth = ExDAV.ExRequest.ExRequestDepths.AllChildrenWithRoot;

            searcher.ExProps.Add("DAV:", "creationdate");

            ExDAV.ExResponse resp = searcher.Search("WHERE \"DAV:isfolder\" = true");

            

            System.Data.DataSet ds = resp.GetDataSet("dsMyExDataSet", "dsMyExTableName");

Check out this article for details on how to access Exchange data from .NET.

ExDAV connection strings

Exchange

ADO.NET