Cosmetic changes including using C# 4 named and optional parameters.
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extra : convert_revision : svn%3Affd33b8c-2492-42e0-bdc5-587b920b7d6d/trunk%4046806
Sound emulation for XNA now uses DynamicSoundEffectInstance.
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extra : convert_revision : svn%3Affd33b8c-2492-42e0-bdc5-587b920b7d6d/trunk%4046563