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Generic constraint syntax also derived from class

I had a problem with the following: I have a generic class with a constraint that results from a non-generic interface:

public abstract class DrilldownBase<W> where W : class, IDrilldown

This code is incorrect because it considers IDrilldown to be a limitation when it is NOT. I want the DrilldownBase class to inherit from IDrilldown. What am I missing?

Thank.

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1 answer

Do not make this part of the limitation.

The restriction should appear after the declaration of inheritance:

public abstract class DrilldownBase<W> : IDrilldown where W : class,
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