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POFinding children in node structure using generic key?
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copied!<blockquote> <p><strong>Possible Duplicate:</strong><br> <a href="https://stackoverflow.com/questions/390900/cant-operator-be-applied-to-generic-types-in-c">Can’t operator == be applied to generic types in C#?</a> </p> </blockquote> <p>I have a "GenericNode"-parent/child structure that I'm trying to make a Find method for.</p> <pre><code>public class GenericNode<TKey, TName> { private GenericNode<TKey, TName> parent; private readonly TKey key; private readonly TName name; private readonly ICollection<GenericNode<TKey, TName>> children; public GenericNode(TKey key, TName name) { this.key = key; this.name = name; children = new Collection<GenericNode<TKey, TName>>(); } // AddChild etc... public GenericNode<TKey, TName> GetChildNodeById(TKey keyToFind) { return FindChild(node => node.key == keyToFind); // <--- THIS WON'T COMPILE } private GenericNode<TKey, TName> FindChild(Func<GenericNode<TKey, TName>, Boolean> matcher) { // Recursive search returning first matching node... } } </code></pre> <p>The above (C# .NET 3.5) doesn't work because it can't compare <code>node.key</code> to <code>keyToFind</code> in the <code>GetChildNodeById</code>-method. I've been trying different generic constraints etc without luck. How can I specify that the TKey:s are the same type?</p> <p>I could just create a derived class with a Guid for key and move the GetChildNodeById to that class but I would like a generic solution if possible. Any thoughts?</p>

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