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    <p>This answer is a wee bit orthogonal - more about the problem than the technology involved.</p> <p>You could use expression trees - they're nice to work with and have VS syntactic sugar.</p> <p>For serialization you need this library (you'll need to compile it too): <a href="http://expressiontree.codeplex.com/" rel="nofollow">http://expressiontree.codeplex.com/</a> <em>(This works with Silverlight 4 too, apparently.)</em></p> <p>The limitation of expression trees is that they only support Lambda expressions - i.e. no blocks.</p> <p>This isn't really a limitation because you can still define other lambda methods within a lambda and pass them to functional-programming helpers such as the Linq API.</p> <p>I've included a simple extension method to show you how to go about adding other helper methods for functional stuff - the key point is that you need to include the assemblies containing the extensions in your serializer.</p> <p>This code works:</p> <pre><code>using System; using System.Linq; using System.Linq.Expressions; using ExpressionSerialization; using System.Xml.Linq; using System.Collections.Generic; using System.Reflection; namespace ExpressionSerializationTest { public static class FunctionalExtensions { public static IEnumerable&lt;int&gt; to(this int start, int end) { for (; start &lt;= end; start++) yield return start; } } class Program { private static Expression&lt;Func&lt;int, int, int&gt;&gt; sumRange = (x, y) =&gt; x.to(y).Sum(); static void Main(string[] args) { const string fileName = "sumRange.bin"; ExpressionSerializer serializer = new ExpressionSerializer( new TypeResolver(new[] { Assembly.GetExecutingAssembly() }) ); serializer.Serialize(sumRange).Save(fileName); Expression&lt;Func&lt;int, int, int&gt;&gt; deserializedSumRange = serializer.Deserialize&lt;Func&lt;int, int, int&gt;&gt;( XElement.Load(fileName) ); Func&lt;int, int, int&gt; funcSumRange = deserializedSumRange.Compile(); Console.WriteLine( "Deserialized func returned: {0}", funcSumRange(1, 4) ); Console.ReadKey(); } } } </code></pre>
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    1. POCreating method dynamically, and executing it
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    1. COForgot to mention that this is serializing to and from an XElement graph so it should be feasible (and is probably already part of the library I included) to get it to fit nicely into a WCF web-service.
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    2. COIf you're doing this for some form of load-balancing or super-computing (who knows? :) - I suspect that parallel Linq calls would also work inside the expression trees and the constraints of P-Linq are, from memory, the same as the constraints on Lambdas.
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    3. COAnd did I mention that there is a built-in expression editing dialog, originally intended for the Workflow Foundation?
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