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Language/Type: C# Set collections
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Write a method named NumUniqueValues that accepts a List of integers as a parameter and returns the number of unique integer values in the list. For example, if a list named l contains the values {3, 7, 3, -1, 2, 3, 7, 2, 15, 15}, the call of NumUniqueValues(l) should return 5. If passed the empty list, you should return 0. Use a set as auxiliary storage to help you solve this problem. Do not modify the list passed in.

Method: Write a C# method as described, not a complete program or class.

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