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    copied!<p>Or better yet, use Mono.Cecil. </p> <p>It will allow you to get at the individual instructions, even manipulating them and disassembling them (with the <a href="http://evain.net/blog/articles/2008/12/15/cecil-decompiler" rel="nofollow">mono decompiler addition</a>). </p> <p>Note that the decompiler is a work in progress (last time I checked it did not fully support lambda expressions and Visual Basic exception blocks), but you can have pretty decompiled output in C# pretty easily as far as you don't hit these boundary conditions. Also, work has progressed since.</p> <p>Mono Cecil in general let's you write the IL to a new assembly, as well, which you can then subsequently load into your appdomain if you like to play with bleeding edge.</p> <p><strong>Update</strong> I came round to trying this. Unfortunately I think I found what problem you run into. It turns out there is seems to be no way to get at the IL bytes for a generated type <em>unless</em> the assembly happened to get written out somewhere you can load it from.</p> <p>I assumed you could just get the bits via reflection (since the classes support the required methods), however the related methods just raise an exception <code>The invoked member is not supported in a dynamic module.</code> on invocation. You can try this with the code below, but <strong>in short I suppose it means that it ain't gonna happen</strong> unless you want to <a href="http://msdn.microsoft.com/en-us/library/system.runtime.interopservices.marshal.getfunctionpointerfordelegate.aspx" rel="nofollow">f*ck with <code>Marshal::GetFunctionPointerForDelegate()</code></a>. You'd have to binary dump the instructions and manually disassemble them as IL opcodes. There be dragons.</p> <p>Code snippet:</p> <pre><code>using System; using System.Linq; using Mono.Cecil; using Mono.Cecil.Cil; using System.Reflection.Emit; using System.Reflection; namespace REFLECT { class Program { private static Type EmitType() { var dyn = AppDomain.CurrentDomain.DefineDynamicAssembly(new AssemblyName("Emitted"), AssemblyBuilderAccess.RunAndSave); var mod = dyn.DefineDynamicModule("Emitted", "Emitted.dll"); var typ = mod.DefineType("EmittedNS.EmittedType", System.Reflection.TypeAttributes.Public); var mth = typ.DefineMethod("SuperSecretEncryption", System.Reflection.MethodAttributes.Public | System.Reflection.MethodAttributes.Static, typeof(String), new [] {typeof(String)}); var il = mth.GetILGenerator(); il.EmitWriteLine("Emit was here"); il.Emit(System.Reflection.Emit.OpCodes.Ldarg_0); il.Emit(System.Reflection.Emit.OpCodes.Ret); var result = typ.CreateType(); dyn.Save("Emitted.dll"); return result; } private static Type TestEmit() { var result = EmitType(); var instance = Activator.CreateInstance(result); var encrypted = instance.GetType().GetMethod("SuperSecretEncryption").Invoke(null, new [] { "Hello world" }); Console.WriteLine(encrypted); // This works happily, print "Emit was here" first return result; } public static void Main (string[] args) { Type emitted = TestEmit(); // CRASH HERE: even if the assembly was actually for SaveAndRun _and_ it // has actually been saved, there seems to be no way to get at the image // directly: var ass = AssemblyFactory.GetAssembly(emitted.Assembly.GetFiles(false)[0]); // the rest was intended as mockup on how to isolate the interesting bits // but I didn't get much chance to test that :) var types = ass.Modules.Cast&lt;ModuleDefinition&gt;().SelectMany(m =&gt; m.Types.Cast&lt;TypeDefinition&gt;()).ToList(); var typ = types.FirstOrDefault(t =&gt; t.Name == emitted.Name); var operands = typ.Methods.Cast&lt;MethodDefinition&gt;() .SelectMany(m =&gt; m.Body.Instructions.Cast&lt;Instruction&gt;()) .Select(i =&gt; i.Operand); var requiredTypes = operands.OfType&lt;TypeReference&gt;() .Concat(operands.OfType&lt;MethodReference&gt;().Select(mr =&gt; mr.DeclaringType)) .Select(tr =&gt; tr.Resolve()).OfType&lt;TypeDefinition&gt;() .Distinct(); var requiredAssemblies = requiredTypes .Select(tr =&gt; tr.Module).OfType&lt;ModuleDefinition&gt;() .Select(md =&gt; md.Assembly.Name as AssemblyNameReference); foreach (var t in types.Except(requiredTypes)) ass.MainModule.Types.Remove(t); foreach (var unused in ass.MainModule .AssemblyReferences.Cast&lt;AssemblyNameReference&gt;().ToList() .Except(requiredAssemblies)) ass.MainModule.AssemblyReferences.Remove(unused); AssemblyFactory.SaveAssembly(ass, "/tmp/TestCecil.dll"); } } } </code></pre>
 

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