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  • Blog Post: Silverlight 4 Socket Policy Changes

    After installing the Silverlight plugin, a Silverlight application is able to run on your computer without your explicit consent whenever you browse to a webpage which links to it. Because there is no explicit user action required to run, Silverlight applications are executed within what is known as...
  • Blog Post: UDP Multicast in Silverlight 4

    In Silverlight 4, we have added multicast support. If you’re not familiar with multicast, here’s a quick scenario to explain what it is and why it might be useful to you. Scenario Overview Suppose your company provides market data and you need to distribute the same commodity and value records...
  • Blog Post: Why does Silverlight have a restricted port range for Sockets?

    Silverlight restricts the ports of outgoing TCP socket connections to the range 4502 – 4534. Connecting to a different port requires the use of a server-side proxy or port redirector. One of the most common questions we hear from customers about this is, “Why do you restrict the port range in Silverlight...
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