title: Adding new columns at runtime
body: <p>I am working in Silverlight MVVM pattern, there is a datagrid (component one) which initially will be having 4 columns, later at runtime user will be displayed list of columns in combobox, he can select the columns he want to see in the datagrid and click a button to add the columns in datagrid, so at runtime i have to add the Column in the datagrid. Is it possible using the Silverlight MVVM pattern. Please help.</p>