using System;
using System.Linq;
using System.Text;
using System.Collections.Generic;

using System.CodeDom.Compiler;
using Microsoft.CSharp;
using System.Reflection;

namespace CSHARP_EVAL_FUNCTION
{
public class EVAL
{
private static string prefix = @"using System;
public static class DynamicClass
{
public static void Bomb()
{";

public static string postfix = @"}}";

public string content { get; set; }

public void Eval()
{
if (content == "")
{
Console.WriteLine("必须为Content属性赋予值");
return;
}
string code = prefix + content + postfix;
CompilerResults result = null;

using (var provider = new CSharpCodeProvider())
{
var options = new CompilerParameters();
options.GenerateInMemory = true;

result = provider.CompileAssemblyFromSource(options, code);

if (result.Errors.HasErrors)//编译有错误
{
var errorMsg = new StringBuilder();
foreach (CompilerError error in result.Errors)
{
errorMsg.AppendFormat("Line:{0},Column:{1},Content:{2}", error.Line, error.Column, error.ErrorText);
}
Console.WriteLine(errorMsg.ToString());
}
else//运行类 DynamicClass 中的HelloWorld方法
{

Type dynamicClass = result.CompiledAssembly.GetType("DynamicClass");
dynamicClass.InvokeMember("Bomb", BindingFlags.InvokeMethod | BindingFlags.Static | BindingFlags.Public, null, null, null);
}
}

}
}
}

http://blog.csdn.net/ghostbear/article/details/7764510

c# 中的evel