title: Null-able foreign key; Entity Framework 5.0 model-first
body: <p>I'm using Entity Framework 5.0 model-first approach using Visual Studio 2012 Express. I have a scenario to generate a nullable foreign key. For example, there are two entities – <code>Organization</code> and <code>User</code>. Not all users will belong to an organization. However, some users would belong to an organization. The <code>User.Organization_ID</code> column is always <code>not null</code> in spite of changing the multiplicity. Please help me to resolve this issue. Appreciate it.</p>