Interlocked. Increment 方法
以下示例确定从 0 到 1，000 的随机数，需要多少个随机数，才能生成 1，000 个随机数，其中包含中点值。 为了跟踪中点值的数量，变量 midpointCount 设置为等于 0，并且每次随机数生成器返回中点值直到达到 10，000 时递增。 由于三个线程生成随机数， Increment(Int32) 因此调用该方法以确保多个线程不会并发更新 midpointCount 。 请注意，锁还用于保护随机数生成器，并且对象用于确保 Main 方法未在三个CountdownEvent线程之前完成执行。
以下示例类似于上一个示例，只不过它使用 Task 类而不是线程过程生成 50，000 个随机中点整数。 在此示例中，lambda 表达式将替换 GenerateNumbers 线程过程，并且对 Task.WaitAll 方法的调用无需 CountdownEvent 对象。
此方法通过包装处理溢出条件：如果 location = Int32.MaxValue， location + 1 = 。 Int32.MinValue 不引发异常。
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