title: DataGrid validation display error problem
body: <p>I have a little problem with the silverlight data grid. I wrote a little sample app to show the problem. (You can download it here: <a href="http://rapidshare.com/files/433480041/DataGridValidationTest.zip" rel="nofollow noreferrer">http://rapidshare.com/files/433480041/DataGridValidationTest.zip</a>). <br/>
  Here you can Add a new Person (has a Name and an Age) to a Collection which is displayed in a DataGrid.<br/> I also implemented the validation based on the INotifyDataErrorInfo interface. If you click save, the data is validatet (Name must not be null, Age gt 0). <br/> <br/>
  The validation works fine, but the validation errors are only displayed if I click into one row. After clicking the Save Button, the data is validatet, but not shown in the grid (see picture below): <br />
  <img src="https://i.stack.imgur.com/bB6uj.jpg" alt="Validation is not shown :("></p>
  
  <p>If I click in the row, to change the data, the validation message is shown (picture below):
  <img src="https://i.stack.imgur.com/MsX4l.jpg" alt="Validation shown"></p>
  
  <p>If I'm in that row, I have to resolve the problem, cause I'm not able to select another cell.</p>
  
  <p>Does anyone know, how I can show (all) errors directly in the grid?
  And can I get out of the cell with the error without resolving the problem?</p>
  
  <p>Thx in advance,</p>
  
  <p>TJ</p>