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    <p>I ran into a similair problem and would like to add to Jon Skeets answer that there is another option. The reason I found out was that I realized that many extension methods in Asp MVC3 uses anonymous classes as input to provide html attributes (new {alt="Image alt", style="padding-top: 5px"} => </p> <p>Anyway - those functions use the constructor of the RouteValueDictionary class. I tried that myself, and sure enough it works - though only the first level (I used a multi-level structure). SO - in code this would be:</p> <pre><code>object o = new { name = "theName", props = new { p1 = "prop1", p2 = "prop2" } } SeparateAssembly.TextFunc(o) //In SeparateAssembly: public void TextFunc(Object o) { var rvd = new RouteValueDictionary(o); //Does not work: Console.WriteLine(o.name); Console.WriteLine(o.props.p1); //DOES work! Console.WriteLine(rvd["name"]); //Does not work Console.WriteLine(rvd["props"].p1); Console.WriteLine(rvd["props"]["p1"]); </code></pre> <p>SO... What is really going on here? A peek inside the RouteValueDictionary reveals this code (values ~= o above):</p> <pre><code>foreach (PropertyDescriptor descriptor in TypeDescriptor.GetProperties(values)) object obj2 = descriptor.GetValue(values); //"this.Add" would of course need to be adapted this.Add(descriptor.Name, obj2); } </code></pre> <p>SO - using TypeDescriptor.GetProperties(o) we would be able to get the properties and values despite the anonymous type being constructed as internal in a separate assembly! And of course this would be quite easy to extend to make it recursive. And to make an extension method if you wanted.</p> <p>Hope this helps!</p> <p>/Victor</p>
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    1. COI wonder if you realize you're calling `p1` `prop1`.
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    2. COSorry for that confusion. Code updated from prop1 => p1 where appropriate. Still - the idea with the entire post was to put forward TypeDescriptor.GetProperties as an option to solve the problem, which hopefully was clear anyway...
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