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POLinq Where is not recognizing operator overloads with custom object
 

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  1. POLinq Where is not recognizing operator overloads with custom object
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    <p>I have a private class, User that implements an interface, IQMUser, with </p> <pre><code> public static bool operator ==( User a, User b ) { return Equals( a, b ); } public static bool operator !=( User a, User b ) { return !Equals( a, b ); } public override bool Equals ( object obj ) { User other = obj as User; return m_LMUser.UserID == other.m_LMUser.UserID; } public override int GetHashCode ( ) { return m_LMUser.GetHashCode ( ); } </code></pre> <p>User is a member of a public class, UserManager, which has GetUsers( ), which returns <code>IList&lt;IQMUser&gt;</code>. In another class, I have</p> <pre><code> IQMUser otherUser = UserManager.GetUsers( ) .Where( u =&gt; u != CurrentUser ) .FirstOrDefault( ); </code></pre> <p>Now, I know for a fact that GetUsers returns an object that has the same m_LMUser.UserID as CurrentUser. However, the test u != CurrentUser is always true, even in that case.</p> <p>I have set breakpoints at each of the operator overloads and the Equals override in User, but none of them hit.</p> <p>I then changed the query to </p> <pre><code> IQMUser otherUser = UserManager.GetUsers( ) .Where( u =&gt; !u.Equals( CurrentUser ) ) .FirstOrDefault( ); </code></pre> <p>This hits the overridden Equals method as expected.</p> <p>What is wrong with my operator overloads that Linq doesn't even hit them?</p>
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    1. USKelly Cline
    1. USKelly Cline
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    1. COWhat's the type of `UserManager.GetUsers()`?
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      1. USJon Skeet
    2. CO`IList<IQMUser>`
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      1. USKelly Cline
    3. COWell that explains it then - you would see exactly the same thing if you tried it with any variables of type `IQMUser`.
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      1. USJon Skeet
 

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