你可以使用 CodeDom ( CodeDomProvider ) 或 roslyn（ 完整代码 / 片段 ）来实现。
CodeDom的优势：
直接内置，不用引用庞大的Nuget包；编译速度快，配置简单；支持Javascript；CodeDom的劣势：
只支持低版本的框架和语言；不支持分析功能；roslyn的优势：
强大的分析功能；灵活的实现方式；详细的配置选项；支持高级语法特性；roslyn的劣势：
需要引入巨大的包(Microsoft.CodeAnalysis.CSharp，还有个小不点)；编译速度缓慢；下面的代码演示了实现的三个思路：
using System;using System.CodeDom.Compiler;using System.Collections.Generic;using System.IO;using System.Linq;using System.Reflection;using Microsoft.CodeAnalysis;using Microsoft.CodeAnalysis.CSharp;using Microsoft.CodeAnalysis.CSharp.Scripting;using Microsoft.CodeAnalysis.Scripting;namespace CompileSample{ class Program { static void Main(string args) { var source = @" using System; namespace Sample { public class Program { public static void Main() { Console.WriteLine(""hello, world""); } } }"; var a = GetAssemblyFromSourceByCodeDom(source); var b = GetAssemblyFromSourceByRoslyn(source); var methodA = a.CreateInstance("Sample.Program").GetType().GetMethod("Main"); var methodB = b.CreateInstance("Sample.Program").GetType().GetMethod("Main"); methodA.Invoke(null, null); methodB.Invoke(null, null); RunStringCodeByRoslyn(@"Console.WriteLine(""hello, world"");"); Console.ReadKey(); } static Assembly GetAssemblyFromSourceByCodeDom(params string source) { using var provider = CodeDomProvider.CreateProvider( "CSharp", new Dictionary\u0026lt;string, string\u0026gt; { { "CompilerVersion", "v4.0" }}); var compileResult = provider.CompileAssemblyFromSource( new CompilerParameters() { IncludeDebugInformation = false, TreatWarningsAsErrors = true, WarningLevel = 4, GenerateExecutable = false, GenerateInMemory = true }, source); if (compileResult.Errors.Count \u0026gt; 0) { throw new ArgumentException(); } return compileResult.CompiledAssembly; } static Assembly GetAssemblyFromSourceByRoslyn(string source) { var compilation = CSharpCompilation.Create( null, new { CSharpSyntaxTree.ParseText(source) }, new { MetadataReference.CreateFromFile(typeof(object).Assembly.Location) }, new CSharpCompilationOptions(OutputKind.DynamicallyLinkedLibrary)); using var memSteam = new MemoryStream(); var emitResult = compilation.Emit(memSteam); if (!emitResult.Success || emitResult.Diagnostics.FirstOrDefault(x =\u0026gt; x.Severity \u0026gt; 0) != null) { throw new ArgumentException(); } memSteam.Seek(0, SeekOrigin.Begin); return Assembly.Load(memSteam.ToArray()); } static void RunStringCodeByRoslyn(string source) { _ = CSharpScript.RunAsync(source, ScriptOptions.Default .AddReferences(new { MetadataReference.CreateFromFile(typeof(object).Assembly.Location) }) .AddImports("System") .WithLanguageVersion(LanguageVersion.CSharp8) .WithOptimizationLevel(OptimizationLevel.Release) .WithEmitDebugInformation(false) .WithWarningLevel(4) ).Result; } }}