在C#4.0中执行一个字符串

using System;
using System.CodeDom.Compiler;
using System.Reflection;

namespace ExecuteStringInCSharp4
{
    class Program
    {
        static void Main(string[] args)
        {
            string code = @"
                using System;
                namespace MyNamespace
                {
                    public class MyCode
                    {
                        public static void Execute()
                        {
                            Console.WriteLine(""Hello, World!"");
                        }
                    }
                }";

            CompileAndExecute(code);
        }

        static void CompileAndExecute(string code)
        {
            // 创建CSharpCodeProvider实例
            CSharpCodeProvider provider = new CSharpCodeProvider();

            // 设置编译参数
            CompilerParameters parameters = new CompilerParameters();
            parameters.GenerateExecutable = false;
            parameters.GenerateInMemory = true;
            parameters.ReferencedAssemblies.Add("System.dll");

            // 编译代码
            CompilerResults results = provider.CompileAssemblyFromSource(parameters, code);

            // 检查编译是否成功
            if (results.Errors.Count > 0)
            {
                Console.WriteLine("编译错误：");
                foreach (CompilerError error in results.Errors)
                {
                    Console.WriteLine(error.ErrorText);
                }
                return;
            }

            // 加载编译后的程序集
            Assembly assembly = results.CompiledAssembly;

            // 获取MyNamespace.MyCode类型
            Type myCodeType = assembly.GetType("MyNamespace.MyCode");

            // 调用Execute方法
            MethodInfo executeMethod = myCodeType.GetMethod("Execute");
            executeMethod.Invoke(null, null);
        }
    }
}