用dynamic expression運行時訪問dynamic object

實驗了好久才弄出來，msdn上怎麼就不給下樣本。。。

            var eo = new System.Dynamic.ExpandoObject();            dynamic o = eo;            o.hello = "world";            var oDynamic = Expression.Lambda<Func<string>>(                Expression.MakeDynamic(                    typeof(Func<System.Runtime.CompilerServices.CallSite, object, string>),                    Microsoft.CSharp.RuntimeBinder.Binder.Convert(0, typeof(string), typeof(Program)),                    Expression.MakeDynamic(typeof(Func<System.Runtime.CompilerServices.CallSite, object, object>),                        Microsoft.CSharp.RuntimeBinder.Binder.GetMember(                            Microsoft.CSharp.RuntimeBinder.CSharpBinderFlags.None,                            "hello",                            typeof(Program),                            new Microsoft.CSharp.RuntimeBinder.CSharpArgumentInfo[] { Microsoft.CSharp.RuntimeBinder.CSharpArgumentInfo.Create(0, null) }),                        Expression.Constant(eo)                    )                )            );            Console.WriteLine(oDynamic.Compile()());