title: Which ORM does fit best here?
body: <p>I need to choose an ORM for a project and I only have some experience with NHibernate. I have been reading Q&amp;A from StackOverflow, and the most similar to my needs is <a href="https://stackoverflow.com/questions/1691575/what-orm-for-net-should-i-use?rq=1">What ORM for .net should I use?</a>, but I would like to have an answer more adequate to the present products (the link is from 2009) and that also take into account some points of my project.</p>
  
  <p>The easiest solution for me would be to use NHibernate because it is mature, feature rich and I have already used it, but I prefer to choose the best option for the project even if I have to "study" again.</p>
  
  <p>The project is going to start as a core that communicates with SAP. The core has to support standalone and/or co-dependent modules, and each one of them may need to work with its own data from the database. The final step will be to implement the part of SAP that we use. The characteristics I need are the ones from the previous link and here are some more things to have in mind:</p>
  
  <ul>
  <li><p>I would like to be able to split the data access layer so that a user with one or two modules won't need the whole thing.</p></li>
  <li><p>A designer would be appreciated.</p></li>
  <li><p>It will start with about 20-30 tables and, within a couple of years, that number will grow in several hundreds.</p></li>
  <li><p>The amount of registers per table will vary from two or three to 150000+ (very few).</p></li>
  <li><p>IT DOES NOT NEED TO BE A ONE PRODUCT SOLUTION. Combinations like NHibernate and Devart Entity Develop are also welcome.</p></li>
  <li><p>The team for this project will also have students that will have to learn C Sharp and some of them probably don´t know exactly what an ORM is, so it would be great if it is simple or, at least, the basic stuff is not very complex (mixing tons of lambdas, reflection, extension methods, etc.).</p></li>
  </ul>
  
  <p>The last one is not very important. I hope this is specific enough to avoid been closed (the question I link is still open).</p>
  
  <p>EDIT:
  -It is a desktop application.
  -Documentation and comunity are also very very important.</p>