The c Dynamic compilation execution object method example USES the mapping mechanism to create objects

C# is a compiled language, program execution, first through the compiler compilation, how to make C# like a script 1, when to execute, compile, here, we can use CSharpCodeProvider Microsoft.CSharp space to provide classes, to achieve the effect of dynamic compilation. Here, I create a new console program that references using System.CodeDom.Compiler in the Program.cs class.
using System. Reflection; using Microsoft. CSharp; Three large namespaces

#region using directiry
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.CodeDom;
using System.CodeDom.Compiler;
using System.Reflection;
using Microsoft.CSharp;
#endregion
/*==============================================================================
 * 
 * author:lichaoqiang@163.com
 * link:http://my.oschina.net/lichaoqiang
 * 
 * 
 * ============================================================================*/
namespace CodeDom
{
    class Program
    {
        #region  Main program entry 
        /// <summary>
        /// Main program entry  
        /// </summary>
        /// <param name="args"></param>
        static void Main(string[] args)
        {
            //1> instantiation C# Code services provide objects 
            CSharpCodeProvider provider = new CSharpCodeProvider();
            //2> Declare compiler parameters 
            CompilerParameters parameters = new CompilerParameters();
            parameters.GenerateExecutable = false;
            parameters.GenerateInMemory = true;
            try
            {
                //3> Dynamic compilation 
                CompilerResults result = provider.CompileAssemblyFromSource(parameters, BuildCSharpCode());
                if (result.Errors.Count > 0)
                {
                    Console.Write(" Compile error! ");
                }
                //4> If no compilation error occurs, the dynamic assembly has been generated at this point LCQ.LCQClass
                //5> Started to play C# mapping 
                Assembly assembly = result.CompiledAssembly;
                object obj = assembly.CreateInstance("LCQ.LCQClass");
                Type type = assembly.GetType("LCQ.LCQClass");
                //6> Get object method 
                MethodInfo method = type.GetMethod("Sum");
                object[] objParameters = new object[2] { 1, 5 };
                int iResult = Convert.ToInt32(method.Invoke(obj, objParameters));// Wake up the object and perform the action 
                Console.Write(iResult);
                Console.Read();
            }
            catch (System.NotImplementedException ex)
            {
                Console.Write(ex.Message);
            }
            catch (System.ArgumentException ex)
            {
                Console.Write(ex.Message);
            }
            catch (Exception ex)
            {
                Console.Write(ex.Message);
            }
        }
        #endregion
        #region  Generate code blocks 
        /// <summary>
        ///  Generate code blocks 
        /// </summary>
        /// <returns></returns>
        private static string BuildCSharpCode()
        {
            string fileName = AppDomain.CurrentDomain.BaseDirectory.Replace("Debug", string.Empty).Replace("Release", string.Empty) + "CodeFile.cs";
            string strCodeDom = File.ReadAllText(fileName);
            return strCodeDom;
        }
        #endregion
    }
}