C#动态编译并执行代码

先来张运行时截图：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Microsoft.CSharp;
using System.CodeDom.Compiler;
using System.Reflection;

namespace CSharpDynamicCode
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btnRun_Click(object sender, EventArgs e)
        {
            run();
        }

        void run()
        {
            CSharpCodeProvider objCSharpCodePrivoder = new CSharpCodeProvider();
            ICodeCompiler objICodeCompiler = objCSharpCodePrivoder.CreateCompiler();

            CompilerParameters objCompilerParameters = new CompilerParameters();

            //添加需要引用的dll
            objCompilerParameters.ReferencedAssemblies.Add("System.dll");
            objCompilerParameters.ReferencedAssemblies.Add("System.Windows.Forms.dll");

            //是否生成可执行文件
            objCompilerParameters.GenerateExecutable = false;

            //是否生成在内存中
            objCompilerParameters.GenerateInMemory = true;

            //编译代码
            CompilerResults cr = objICodeCompiler.CompileAssemblyFromSource(objCompilerParameters, txtCode.Text);

            if (cr.Errors.HasErrors)
            {
                var msg = string.Join(Environment.NewLine, cr.Errors.Cast<CompilerError>().Select(err => err.ErrorText));
                MessageBox.Show(msg, "编译错误");
            }
            else
            {
                Assembly objAssembly = cr.CompiledAssembly;
                object objHelloWorld = objAssembly.CreateInstance("Test");
                MethodInfo objMI = objHelloWorld.GetType().GetMethod("Hello");
                objMI.Invoke(objHelloWorld, null);
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
    }
}