Silverlight dataGrid Control

Hi all....

I need help in Silverlight dataGrid Control...

I have to fire the following queries and load data in a grid view in Silverlight:

1) var qry = from t in context.Employees select new {t.EName, t.ESalary, t.DOJ, t.DOB };

2) var qry = from t in context.Employees select t ;
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Difference - In first query, only 4 Columns and in second query, all the columns are there.

Please help me out...

The datagrid is not loaded.......

I also have attached my code for reference .......

Thanks all in advance !!