title: Report Builder: Expression to find Monday of the current week
body: <p>I can't figure out how to return the Monday of the current week <em>using an expression in Report Builder 3.0</em>. In SQL, it's easy:</p>
  
  <p><code>DATEADD(wk, DATEDIFF(wk,0,GETDATE()), 0)</code></p>
  
  <p>I tried converting this to an expression like this:</p>
  
  <p><code>=DateAdd("w", datediff("w", 0, now()), 0)</code></p>
  
  <p>...but this returned the error: <code>Argument 'Date1' cannot be converted to type 'Date'</code></p>