using System;
using Microsoft.CSharp;
using System.CodeDom.Compiler;
 
class Program
{
 public static void Main()
 {
  // The C# code to execute
  string code = "using System; " +
      "using System.IO; " +
      "public class MyClass{ " +
      " public static void PrintConsole(string message){ " +
      "  Console.WriteLine(message); " +
      " } " +
      "} ";
 
  // Compiler and CompilerParameters
  CSharpCodeProvider codeProvider = new CSharpCodeProvider();
  CompilerParameters compParameters = new CompilerParameters();
 
  // Compile the code
  CompilerResults res = codeProvider.CompileAssemblyFromSource(compParameters, code);
 
  // Create a new instance of the class 'MyClass'　　　　// 有命名空間的，需要命名空間.類名
  object myClass = res.CompiledAssembly.CreateInstance("MyClass");
 
  // Call the method 'PrintConsole' with the parameter 'Hello World'
  // "Hello World" will be written in console
  myClass.GetType().GetMethod("PrintConsole").Invoke(myClass, new object[] {"Hello World" });
 
  Console.Read();
 }
}