title: String.IsNullOrEmpty in LINQ To SQL query?
body: <p>My DBML exposes a record set that has a nullable nvarchar field. This nullable nvarchar field is represented as a string in my C# code. </p>
  
  <p>Sometimes this field is null, sometimes it is an empty string, and sometimes it actually has a value. </p>
  
  <p>Does <code>String.IsNullOrEmpty()</code> work in LINQ To SQL? For instance, would the following work:</p>
  
  <pre><code>var results = from result in context.Records
                where String.IsNullOrEmpty(result.Info) == false
                select result;
  </code></pre>