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POMatching an interface's ProperyInfo with a class's PropertyInfo
 

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    <p>I use a method similar to the following to get some precomputed metadata related to a Type's properties.</p> <pre><code>MyData GetProperty&lt;T, U&gt;(Expression&lt;Func&lt;T, U&gt;&gt; member) { // Get the property referenced in the lambda expression MemberExpression expression = member.Body as MemberExpression; PropertyInfo property = expression.Member as PropertyInfo; // get the properties in the type T PropertyInfo[] candidates = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance); // Find the match foreach (PropertyInfo candidate in candidates) if (candidate == property) return GetMetaData&lt;T&gt;(candidate); throw new Exception("Property not found."); } // Returns precomputed metadata MyData GetMetaData&lt;T&gt;(PropertyInfo property) { ... } </code></pre> <p>As you would expect, it works when used as follows:</p> <pre><code>var data = PropertyInfo((Employee e) =&gt; e.Name); </code></pre> <p>But not when used in the following generic method:</p> <pre><code>void MyGenericMethod&lt;T&gt;(int id) where T : IEmployee { var data = PropertyInfo((T e) =&gt; e.Name); } </code></pre> <p>It fails because the declaring type of <code>property</code> in the first method is now <code>IEmployee</code>, so the property in the lambda doesn't match the property in the type. <strong>How can I get them to match</strong>, without relying on the names of the properties? (There can be multiple properties with the same name if interfaces are implemented explicitly, so <code>p1.Name == p2.Name</code> won't cut it).</p>
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    1. USGreg
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