How I can implement sync calls to WCF services in SIlverlight?

Question

Sometimes I need to call WCF service in Silverlight and block UI until it returns. Sure I can do it in three steps:

1. Setup handlers and block UI
2. Call s

Answer 1

Here's the point; you shouldn't do sync IO in Silverlight. Stop fighting it! Instead:

• disable any critical parts of the UI
• start async IO with callback
• (...)
• in the callback, process the data and update/re-enable the UI

As it happens, I'm actively working on ways to make the async pattern more approachable (in particular with Silverlight in mind). Here's a first stab, but I have something better up my sleeve ;-p