编译动态表达式c＃所需的一种或多种类型

Question

我已经看过：One or more types required to compile a dynamic expression cannot be found. Are you missing references to Microsoft.CSharp.dll and System.Core.dll?但是在尝试了顶级解决方案以及我研究过的其他解决方案后，我仍然无法解决此错误。我的VS面向.NET 4.5.1。此外，还添加了对CSharp的引用。为什么我仍然会收到此错误？

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
using System.Net;
using Important.CoreInterfaces;
using Adaptive.SimpleBinaryEncoding;

private static T method<T>(byte[] pinned_memory, ref int offset)
            {
                //dynamic var = typeof(T);
                dynamic temp = 1;
                DirectBuffer tempd = new DirectBuffer(pinned_memory);
                char messageType = (char)pinned_memory[offset];
                switch(messageType)
                {
                    case 'H':
                        doStuff();
                        break;
                    case 'D':
                        doOtherStuff();
                        break;
                    case 'A':
                        stuff();
                        break;
                    case 'M':
                        break;
                    case 'P':
                        break;
                    case 'F':
                        break;
                    case 'K':
                        break;
                    case 'O':
                        break;
                    case 'C':
                        break;
                    case 'X':
                        break;
                    default:
                        break;
                }

                MessageHeaderEncoder header = new MessageHeaderEncoder();
                header.Wrap(tempd, offset, 1);
                temp.WrapForDecode(tempd, offset, temp.sbeBlockLength(), temp.sbeSchemaVersion()); 
            }