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POHow can I use a HashSet<MyCustomClass> to remove duplicates of MyCustomClass?
 

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  1. POHow can I use a HashSet<MyCustomClass> to remove duplicates of MyCustomClass?
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    <p>I have a <code>HashSet&lt;MyCustomClass&gt; mySet = new HashSet&lt;MyCustomClass&gt;();</code> and I wish to remove all MyCustomClass's that contain the same values. </p> <p>Let's say MyCustomClass looks like this:</p> <pre><code>public class MyCustomClass { Point point; public MyCustomClass(int x, int y) { point.X = x; point.Y = y; } // Other methods... } </code></pre> <p>I tried to implement <code>IEqualityComparer</code> like MSDN suggests, and pass it through the constructor of the <code>HashSet&lt;MyCustomClass&gt;();</code> but I ended up unsuccessfully. </p> <p>What's the correct approach?</p> <p><strong>EDIT:</strong></p> <p>This is my <code>Chain</code> class and my <code>ChainEqualityComparer</code>:</p> <pre><code>public class Chain { HashSet&lt;Mark&gt; chain; HashSet&lt;Mark&gt; marks; public Chain(HashSet&lt;Mark&gt; marks) { chain = new HashSet&lt;Mark&gt;(); this.marks = marks; } // Other methods... } public class ChainEqualityComparer : IEqualityComparer&lt;Chain&gt; { #region IEqualityComparer&lt;Chain&gt; Members public bool Equals(Chain x, Chain y) { if (x.ChainWithMarks.Count == y.ChainWithMarks.Count) { foreach (Mark mark in x.ChainWithMarks) { if (!y.ChainWithMarks.Contains(mark)) return false; } return true; } return false; } public int GetHashCode(Chain obj) { return obj.GetHashCode() ^ obj.GetType().GetHashCode(); } #endregion } </code></pre> <p>And this is my <code>Mark</code> class:</p> <pre><code> public class Mark { int x; int y; public Mark(int x, int y) { this.x = x; this.y = y; } public int X { get { return x; } set { x = value; } } public int Y { get { return y; } set { y = value; } } } public class MarkEqualityComparer : IEqualityComparer&lt;Mark&gt; { #region IEqualityComparer&lt;Mark&gt; Members public bool Equals(Mark x, Mark y) { return (x.X == y.X) &amp;&amp; (x.Y == y.Y); } public int GetHashCode(Mark obj) { return obj.GetHashCode() ^ obj.GetType().GetHashCode(); } #endregion } </code></pre> <p>(I can pastebin the code if it's too much code...)</p>
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