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Home/ Questions/Q 1027567
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Editorial Team
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Editorial Team
Asked: May 16, 20262026-05-16T12:15:31+00:00 2026-05-16T12:15:31+00:00

I read somewhere that interfaces can have member variables. Static final constants only, can

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I read somewhere that interfaces can have member variables.

Static final constants only, can use
them without qualification in classes
that implement the interface. On the
other paw, these unqualified names
pollute the namespace. You can use
them and it is not obvious where they
are coming from since the
qualification is optional.

I am not quite understood by what they meant? Any help?

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  1. Editorial Team
    Editorial Team
    2026-05-16T12:15:32+00:00Added an answer on May 16, 2026 at 12:15 pm

    What you read is incorrect. Interfaces cannot have member variables.

    In VB.Net the only allowable definitions inside an interface are

    • Properties
    • Methods
    • Events
    • Type Definitions (not legal in C#)

    I’m not entirely sure what the above paragraph is referring to. Based on the text though it sounds like it’s refering to Java. They phrase static and final is most often associated with Java code and not .Net (static and readonly).

    Can you give us some more context on it?

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