title: Entity Framework 4.1 code first approach: how to define length of properties
body: <p>As the title implies: </p>
  
  <p>how is it possible to tell Entity Framework 4.1 in code first approach, that i do want some properties (in particular of type string) to have a length of 256, or nvarchar(max), or...</p>
  
  <p>So if this is for example my model </p>
  
  <pre><code>public class Book{
     public string Title { get; set; } //should be 256 chars
     public string Description {get;set} //should be nvarchar(max)
  }
  </code></pre>
  
  <p>how could it be defined?</p>
  
  <p>Thanks in advance!</p>