I question came up over at silverlight.net that I wrote an example for.  The scenario is that we want to bind our RIA Service data context to a DataGrid control via a DomainDataSource.  We also want to have an extra column which computes a value based on other data that exists in each row.

My approach to this scenario is to utilize the code sharing feature of RIA Services to pass across a property which computes the value on client-side.  As you will see, the DataGrid and DomainDataSource accommodate this approach rather nicely.

We’re going to keep things simple on the server-side for this example and not associate our Domain Service to any entities in a database.  So add a new DomainService called “DemoService” but don’t associate it with any data.

Ok now that we have a Domain Service, lets create an entity object to work with in a class file called “Person.cs”:

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