Abstract
When we looked at the Decorator design pattern, we saw the different ways of enhancing the functionality of an object. The Proxy design pattern is similar, but its goal is generally to preserve exactly (or as closely as possible) the API that is being used while offering certain internal enhancements.
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Notes
- 1.
Not that it matters for this particular example, but this implementation is not thread-safe. Imagine two threads that both do a null check, pass it, and then both assign bitmap one after another – the constructor will be called twice. This is why we use System.Lazy, which is thread-safe by design.
- 2.
You can get it from NuGet; the source code is at https://github.com/ekonbenefits/impromptu-interface.
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© 2020 Dmitri Nesteruk
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Nesteruk, D. (2020). Proxy. In: Design Patterns in .NET Core 3. Apress, Berkeley, CA. https://doi.org/10.1007/978-1-4842-6180-4_13
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DOI: https://doi.org/10.1007/978-1-4842-6180-4_13
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