原文：https://www.cnblogs.com/rookey/p/5230945.html

備註：在看項目的時候看到的，順便備註一下。

        public ActionResult Test2()
        {
            string filePath = "E:\\2\\Student.code";
            string[] referenceAssemblyNames = new string[]
                {
                    "System.dll"                    
                };
            
 
//輸出dll
            string outputDll = "E:\\2\\Student.dll";
            string errMsg = CompileFromFile(new string[] { filePath }, referenceAssemblyNames, outputDll);
            return Content(errMsg);
        }

        /// <summary>
        /// 從文件編譯
        /// </summary>
        ///
 
 <param name="files">要編譯的代碼文件集合</param>
        /// <param name="referenceAssemblyNames">引用程序集名稱集合</param>
        /// <param name="outputAssembly">輸出dll名稱</param>
        /// <returns>返回異常信息</returns>
        public static string CompileFromFile(string[] files, string
 
[] referenceAssemblyNames, string outputAssembly)
        {
            CSharpCodeProvider codeProvider = new CSharpCodeProvider();
            CompilerParameters compilerParameters = new CompilerParameters(referenceAssemblyNames, outputAssembly);
            CompilerResults complierResult = codeProvider.CompileAssemblyFromFile(compilerParameters, files);
            if (complierResult.Errors.HasErrors)
            {
                StringBuilder message = new StringBuilder();
                foreach (CompilerError err in complierResult.Errors)
                {
                    message.AppendFormat("(FileName:{0},ErrLine:{1}): error {2}: {3}", err.FileName, err.Line, err.ErrorNumber, err.ErrorText);
                }
                return message.ToString();
            }
            return string.Empty;
        }

Student.code 文件：

using System;

namespace WebApplication1.Controllers
{
    public class Student
    {
        public string Name { get; set; }
    }
}

C# 動態編譯