Microsoft Silverlight 不受瀏覽器和操作系統的限制，雖基于.NET，但不需要預裝.NET框架，為網絡帶來新一代的媒體體驗和豐富的交互式應用程序。Silverlight提供靈活的編程模型，并可以很方便地集成到現有的網絡應用程序中。Microsoft Silverlight 可以對運行在 Mac 或 Windows 上的主流瀏覽器提供高質量視頻信息的快速、低成本的傳遞。它支持跨平臺跨瀏覽器，而且無論在哪里運行，都能提供一致的用戶體驗。

Microsoft Silverlight 播出視頻及動畫的效果很好，不會因為傳輸或播放大量內容而影響播放質量。這一問題是現有技術普遍遇到的障礙，同時也對消費者體驗造成了巨大影響。另外，Microsoft Silverlight 讀取數據及更新外觀的時候，不會通過刷新整體頁面來打斷用戶操作。

更新內容：

1.Fixes Security issue described in the following Microsoft Knowledge Base article:
  2636927 MS12-034: Description of the security update for Microsoft Silverlight: May 8, 2012
2.Fixes an issue where “Best Effort” Silverlight Digital Rights Management Output Protection levels failed on some machines.
3.Fixed a failure to update OOB applications that are configured to use elevated trust when in browser.
4.Fixes an issue where persistent license acquisition would fail when a customer upgrades from Silverlight 4 to Silverlight 5.
5.Fixes an issue where certain character combinations can cause Silverlight application to crash.
6.Fixes an Access Violation described in the following Connect issue https://connect.microsoft.com/Vi ... back/details/719572
7.Fixes an issue where the SL5 plugin displays blank window after installing a font with a font name that starts with “&”.
8.Fixes an issue where moving a focus to TextBox or RichTextBox after moving a focus to ItemsControl causes IME to be disabled.
9.Fixes an issue where Silverlight would not play content which required Output Protection.
10.Fixes a Silverlight DRM issue where some customers encounter hardware ID mismatch errors which can only be resolved by re-individualization.

支持運行環境：Windwos XP/Vista/Windows7

下載地址：Microsoft Silverlight 5.1.10411.0