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- 单项选择题 You are developing a class library. Portions of your code need to access system environment variables. You need to force a runtime SecurityException only when callers that are higher in the call stack do not have the necessary permissions. Which call method should you use?()
A、set.Demand();
B、set.Assert();
C、set.PermitOnly();
D、set.Deny();
- A
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