How to dispose explicitly

[arlyxiao]

Suppose I created the instance

var configuration = new Configuration("<YOUR WRITE KEY>",
            flushPolicies: new List<IFlushPolicy>
            {
                new CountFlushPolicy(),
                new FrequencyFlushPolicy(),
                new StartupFlushPolicy()
            });
    var analytics = new Analytics(configuration);

How to dispose analytics explicitly?

Could I just use analytics = null?

[wenxi-zeng]

duplicate issue. see #113