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    <p>Hmmm... I guess you'd have to parse the tree, checking the node-type and member of each. I'll knock up an example...</p> <pre><code>using System; using System.Linq.Expressions; class Test { public string Foo { get; set; } public string Bar { get; set; } static void Main() { bool test1 = FuncTest&lt;Test&gt;.FuncEqual(x =&gt; x.Bar, y =&gt; y.Bar), test2 = FuncTest&lt;Test&gt;.FuncEqual(x =&gt; x.Foo, y =&gt; y.Bar); } } // this only exists to make it easier to call, i.e. so that I can use FuncTest&lt;T&gt; with // generic-type-inference; if you use the doubly-generic method, you need to specify // both arguments, which is a pain... static class FuncTest&lt;TSource&gt; { public static bool FuncEqual&lt;TValue&gt;( Expression&lt;Func&lt;TSource, TValue&gt;&gt; x, Expression&lt;Func&lt;TSource, TValue&gt;&gt; y) { return FuncTest.FuncEqual&lt;TSource, TValue&gt;(x, y); } } static class FuncTest { public static bool FuncEqual&lt;TSource, TValue&gt;( Expression&lt;Func&lt;TSource,TValue&gt;&gt; x, Expression&lt;Func&lt;TSource,TValue&gt;&gt; y) { return ExpressionEqual(x, y); } private static bool ExpressionEqual(Expression x, Expression y) { // deal with the simple cases first... if (ReferenceEquals(x, y)) return true; if (x == null || y == null) return false; if ( x.NodeType != y.NodeType || x.Type != y.Type ) return false; switch (x.NodeType) { case ExpressionType.Lambda: return ExpressionEqual(((LambdaExpression)x).Body, ((LambdaExpression)y).Body); case ExpressionType.MemberAccess: MemberExpression mex = (MemberExpression)x, mey = (MemberExpression)y; return mex.Member == mey.Member; // should really test down-stream expression default: throw new NotImplementedException(x.NodeType.ToString()); } } } </code></pre>
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    1. USMarc Gravell
    1. USMarc Gravell
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    1. COuhmmm 6 minutes and counting.... :)
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    2. COOddly enough, Expression code isn't simple!
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      1. USMarc Gravell
    3. COExpressions annoy me, they are so powerful yet there is so much missing. +1 for the upload codez
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      1. USAndrew Bullock
 

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