c#动态编译并执行字符串

比较简单，步骤是这样的

string -> compiler -> assembly -> reflection -> execution

直接上代码：

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'

　　　　// 有命名空间的，需要命名空间.类名
        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();
    }
}