Sue you can start learning Silverlight from various material available on web or through coaching. But, I would suggest you to pick some other topic to learn. Microsoft is not too keen in Silverlight any more - Silverlight usage is diminishing (with already less adoption!)
Still, if needed, look here:
CodeProject Silverlight articles[
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Pick any and get started!
Have a look at these too:
MSDN: Silverlight[
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Learn: Silverlight[
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Silverlight get started[
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