public void generate_a_class() { #region sample_using-injected-field var assembly = GeneratedAssembly.Empty(); var type = assembly.AddType("WhatTimeIsIt", typeof(ISaySomething)); var method = type.MethodFor(nameof(ISaySomething.Speak)); var @call = new MethodCall(typeof(NowSpeaker), nameof(NowSpeaker.Speak)); // Create an InjectedField as the argument to // the Speak method var now = new InjectedField(typeof(DateTime), "now"); @call.Arguments[0] = now; method.Frames.Add(@call); assembly.CompileAll(); #endregion _output.WriteLine(type.SourceCode); }