I've seen that some of your controls support DataValidation via "Binding exceptions" (ValidatesOnExceptions).
I found it in this sample http://demos.telerik.com/silverlight/default.aspx#DataValidation/FirstLook
But unfortunately a search in the documentation for "ValidatesOnExceptions" brings no results.
Since this is a common technic for validation (unfortunately there is no IDataErrorInfo available) I was happy when I saw the above linked sample.
I played around a bit with RadGrid and RIA Services - the RIA declarative validation takes place - the exception get's fired...
But what I ever I do - I can't get RadGrid to display the error information.
I went a step back and tried it with a custom (local) datasource - also no luck.
So my question - is it possible that RadGrid simply doesn't support ValidatesOnException handling?