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copied!<p>Thought it was worth showing how all potential options looked and their performance characteristics. Given the following helper classes and functions:</p> <pre><code>public void Test(Func<int> func) { var watch = new Stopwatch(); watch.Start(); for (var i = 0; i <= 1000000; i++) { var test = func(); } Console.WriteLine(watch.ElapsedMilliseconds); } public class FooClass { public int Execute() { return 1;}} </code></pre> <p>Set up and execution:</p> <pre><code>using (Microsoft.CSharp.CSharpCodeProvider foo = new Microsoft.CSharp.CSharpCodeProvider()) { var res = foo.CompileAssemblyFromSource( new System.CodeDom.Compiler.CompilerParameters() { GenerateInMemory = true }, "public class FooClass { public int Execute() { return 1;}}" ); var real = new FooClass(); Test(() => real.Execute()); // benchmark, direct call var type = res.CompiledAssembly.GetType("FooClass"); var obj = Activator.CreateInstance(type); var method = type.GetMethod("Execute"); var input = new object[] { }; Test(() => (int)method.Invoke(obj, input)); // reflection invoke dynamic dyn = Activator.CreateInstance(type); Test(() => dyn.Execute()); // dynamic object invoke var action = (Func<int>)Delegate.CreateDelegate(typeof(Func<int>), null, method); Test(() => action()); // delegate } </code></pre> <p>The results are:</p> <pre><code>8 // direct 771 // reflection invoke 41 // dynamic object invoke 7 // delegate </code></pre> <p>So in those cases where you can't use delegates (if you don't know enough?), you can try <code>dynamic</code>.</p>

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