How to get private, constant or static value of a field with reflection

To get the value of a private field of an instance in C#:

var actualNumberOfWinners =
    evaluator
        .GetType()
        .GetField("_numberOfWinners", BindingFlags.NonPublic | BindingFlags.Instance)
        .GetValue(evaluator);

Similarly, you can quite easily retrieve the value of a const or static field for a type, simply replace BindingFlags.Instance with BindingFlags.Static and call GetValue with null:

var constNumberOfWinners =
    evaluator
        .GetType()
        .GetField("DefaultNumberOfWinners", BindingFlags.NonPublic | BindingFlags.Static)
        .GetValue(null);

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Yan Cui

I’m an AWS Serverless Hero and the author of Production-Ready Serverless. I have run production workload at scale in AWS for nearly 10 years and I have been an architect or principal engineer with a variety of industries ranging from banking, e-commerce, sports streaming to mobile gaming. I currently work as an independent consultant focused on AWS and serverless.

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