title: Migrating from Silverlight 2 to 4
body: <p>We have a moderately complex silverlight based application written in Silverlight 2. Eventually we will move to Silverlight 4. In terms of porting effort, would it be better to to port our app from SL2 to SL3, and then to SL4. Or, should be port from SL2 to SL4 in one step.</p>