CSharpCodeProvider C#动态解析字符串 生成执行方法

namespace FastORM{    class Program    {        static void Main(string[] args)        {            // 1.CSharpCodePrivoder            CSharpCodeProvider objCSharpCodePrivoder = new CSharpCodeProvider();            // 2.ICodeComplier            ICodeCompiler objICodeCompiler = objCSharpCodePrivoder.CreateCompiler();            // 3.CompilerParameters            CompilerParameters objCompilerParameters = new CompilerParameters();            objCompilerParameters.ReferencedAssemblies.Add("System.dll");            objCompilerParameters.GenerateExecutable = false;            objCompilerParameters.GenerateInMemory = true;            // 4.CompilerResults            CompilerResults cr = objICodeCompiler.CompileAssemblyFromSource(objCompilerParameters, GenerateCode());            if (cr.Errors.HasErrors)            {                Console.WriteLine("编译错误：");                foreach (CompilerError err in cr.Errors)                {                    Console.WriteLine(err.ErrorText);                }            }            else            {                // 通过反射，调用HelloWorld的实例                Assembly objAssembly = cr.CompiledAssembly;                object objHelloWorld = objAssembly.CreateInstance("DynamicCodeGenerate.HelloWorld");                MethodInfo objMI = objHelloWorld.GetType().GetMethod("OutPut");                Console.WriteLine(objMI.Invoke(objHelloWorld, null));            }            Console.ReadLine();        }        static string GenerateCode()        {            StringBuilder sb = new StringBuilder();            sb.Append("using System;");            sb.Append(Environment.NewLine);            sb.Append("namespace DynamicCodeGenerate");            sb.Append(Environment.NewLine);            sb.Append("{");            sb.Append(Environment.NewLine);            sb.Append("      public class HelloWorld");            sb.Append(Environment.NewLine);            sb.Append("      {");            sb.Append(Environment.NewLine);            sb.Append("          public string OutPut()");            sb.Append(Environment.NewLine);            sb.Append("          {");            sb.Append(Environment.NewLine);            sb.Append("               return \"Hello world!\";");            sb.Append(Environment.NewLine);            sb.Append("          }");            sb.Append(Environment.NewLine);            sb.Append("      }");            sb.Append(Environment.NewLine);            sb.Append("}");            string code = sb.ToString();            Console.WriteLine(code);            Console.WriteLine();            return code;        }    }}