本文深入解析了C#中的Cast与OfType操作符的使用场景和区别，详细解释了它们如何处理集合中的元素类型转换，并通过实例演示了它们在实际编程中的应用。
The difference between the two operators is that the Cast operator will attempt to cast every
element in the collection to the specified type to be put into the output sequence. If there is a type in the
collection that cannot be cast to the specified type, an exception will be thrown. The OfType operator
will only attempt to put those elements that can be cast to the type specified into the output sequence.
from<<Pro.LINQ.Language Integrated Qurey in C Sharp 2010>>
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