What's the difference between Lazy.Force() and Lazy.Value

On the MSDN documentation for Lazy.Force<T> extension method says:

Forces the execution of this value and returns its result. Same as Value. Mutual exclusion is used to prevent other thr开发者_StackOverfloweads from also computing the value.

Does it mean that it's equivalent to creating a Lazy<T> instance with ExecutionAndPublication LazyThreadSafetyMode so that only one thread can initialize the instance?

Thanks

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Yes. They are both the same, and both make sure that the value will be computed only once.

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It's a bit strange that the method exists and is not a function - it's not composable and replicates the behavior of .Value.

I would define something like the following (as seen in the F# compiler):

module Lazy =
    // Lazy.force : Lazy<'T> -> 'T
    let force (x: Lazy<'T>) = x.Force()