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POPassing the interface of a class throws errors but passing just the class works fine
 

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    <p>I have two classes:</p> <p>DefectsController</p> <pre><code>public abstract class DefectsController&lt;TDefect, TDefectService&gt; : ApplicationController&lt;DefectsController&lt;TDefect, TDefectService&gt;, TDefect&gt; where TDefectService : IEntityService&lt;TDefect&gt; where TDefect : Defect { private readonly TDefectService defectService; public DefectsController(TDefectService defectService) : base(defectService) { this.defectService = defectService; } } </code></pre> <p>and JobDefectsController (there are other parts as well, these are just examples)</p> <pre><code>public class JobDefectsController : DefectsController&lt;JobDefect, IEntityService&lt;JobDefect&gt;&gt; { public JobDefectsController(EntityService&lt;JobDefect&gt; service) : base(service) { } } </code></pre> <p>For some reason if I change JobDefectsController's constructor to using IEntityService instead then if I try to access <code>defectService</code> in the DefectsController it throws unknown errors.</p> <p>Edit: This error: The number of generic arguments provided doesn't equal the arity of the generic type definition.<br> Parameter name: instantiation</p> <p>There used to be a class called <code>JobDefectsService</code> which inherited from <code>IEntityService&lt;JobDefect&gt;</code> and the interface of that (<code>IJobDefectService</code>) could be used in place of both <code>IEntityService&lt;JobDefect&gt;</code> and <code>EntityService&lt;JobDefect&gt;</code> without problems.</p> <p>Anyone have any clue to what the problem could be?</p> <p>Thanks,<br> Harold</p>
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    1. USHarold
    1. USHarold
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    1. COWhat do you mean by "it throws unknown errors"?
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      1. POPassing the interface of a class throws errors but passing just the class works fine
      1. USJon Skeet
    2. COWhat's this tag soup :-)
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      1. POPassing the interface of a class throws errors but passing just the class works fine
      1. USDarin Dimitrov
    3. CO"The number of generic arguments provided doesn't equal the arity of the generic type definition. Parameter name: instantiation"
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      1. POPassing the interface of a class throws errors but passing just the class works fine
      1. USHarold
 

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