private static void ParameterIntercept(ILGenerator ilGenerator, IInterceptor[] interceptors, LocalBuilder[] local, MethodInfo method) { var parameterInterceptors = interceptors.GetParameterInterceptors(); if (!parameterInterceptors.Any()) return; var invocationType = InternalDynamicTypeProvider.CreateType<IParameterInvocation>(); var parameterType = InternalDynamicTypeProvider.CreateType<IParameter>(); var setInterceptedMethod = invocationType.GetMethod("set_InterceptedMethod"); var setInterceptedType = invocationType.GetMethod("set_InterceptedType"); var setInterceptedInstance = invocationType.GetMethod("set_InterceptedInstance"); var setParameters = invocationType.GetMethod("set_Parameters"); var setValue = parameterType.GetMethod("set_Value"); var getValue = parameterType.GetMethod("get_Value"); var setName = parameterType.GetMethod("set_Name"); var setParameterInfo = parameterType.GetMethod("set_ParameterInfo"); var getName = typeof(ParameterInfo).GetMethod("get_Name"); var getParameterInterceptors = typeof(InterceptorExtends).GetMethod("GetParameterInterceptors"); var getCurrentParameter = typeof(InterceptorExtends).GetMethod("GetCurrentParameter"); var onIntercept = typeof(IParameterInterceptor).GetMethod("OnParameterExecuting"); var interceptorLocal = ilGenerator.DeclareLocal(typeof(IParameterInterceptor[])); var parametersLocal = ilGenerator.DeclareLocal(typeof(IParameter[])); ilGenerator.LoadLocal(local[0]).Call(getParameterInterceptors).StoreLocal(interceptorLocal); var invocationLocal = ilGenerator.DeclareLocal(invocationType); ilGenerator.New(invocationType.GetConstructor(Type.EmptyTypes)).StoreLocal(invocationLocal); ilGenerator.LoadLocal(invocationLocal).LoadLocal(local[1]).Callvirt(setInterceptedMethod); ilGenerator.LoadLocal(invocationLocal).LoadLocal(local[2]).Callvirt(setInterceptedType); ilGenerator.LoadLocal(invocationLocal).This().Callvirt(setInterceptedInstance); ilGenerator.ForEach(parameterInterceptors, (_, interceptor, i) => { var parameters = method.GetParameters().Where(p => p.GetCustomAttributes(false).Any(c => c.GetType() == interceptor.GetType())).ToArray(); ilGenerator.NewArray(typeof(IParameter), parameters.Length).StoreLocal(parametersLocal); ilGenerator.ForEach(parameters, (__, parameter, j) => ilGenerator.ForEach(method.GetParameters(), (___, arg, k) => { if (arg == parameter) { var argLocal = ilGenerator.DeclareLocal(parameterType); ilGenerator.New(parameterType.GetConstructor(Type.EmptyTypes)).StoreLocal(argLocal); ilGenerator.LoadLocal(argLocal).LoadArgument(k + 1).Box(arg.ParameterType).Callvirt(setValue); ilGenerator.LoadLocal(argLocal).LoadLocal(local[1]).LoadInt(k).Call(getCurrentParameter).Callvirt(setParameterInfo); ilGenerator.LoadLocal(argLocal).LoadLocal(local[1]).LoadInt(k).Call(getCurrentParameter).Callvirt(getName).Callvirt(setName); ilGenerator.LoadLocal(parametersLocal).LoadInt(j).LoadLocal(argLocal).SetArrayItemRef(); } })); ilGenerator.LoadLocal(invocationLocal).LoadLocal(parametersLocal).Callvirt(setParameters); ilGenerator.LoadLocal(interceptorLocal).LoadArrayItem(i).LoadLocal(invocationLocal).Callvirt(onIntercept); ilGenerator.ForEach(parameters, (__, parameter, j) => ilGenerator.ForEach(method.GetParameters(), (___, arg, k) => { if (arg == parameter) { ilGenerator.LoadLocal(parametersLocal).LoadArrayItem(j).Callvirt(getValue).UnBox(arg.ParameterType).StroeArgument(k + 1); } })); }); }