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Editorial Team
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Asked: 2026-05-11T17:17:44+00:00

I’m creating a specialised proxy class that implements IList<T> and wraps an internal List<T>

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I’m creating a specialised proxy class that implements IList<T> and wraps an internal List<T> instance.

List<T> itself implements IList<T>, which declares a member bool IsReadOnly, but when I try to access that member from my own class, I can’t because in List<T>, IsReadOnly is private.

So my question is; if an implementation of an interface requires all implemented members to be public, why does List<T> get to implement IsReadOnly as private and thus deny me access to it?

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1 Answer

  1. Editorial Team

    It implements the interface member explicitly.

    http://msdn.microsoft.com/en-us/library/aa288461(VS.71).aspx

    Note that this does not make the interface member private. It’s still available publicly, but only if you look at the object through the interface (with casting).

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