前言

经常有人问：怎么查看.NET汇编代码？一般的来说查看ASM，可以通过VS菜单栏-】调试-】汇编，来查看。此处查看的是ASM是未优化，粗糙的代码。专业点的会通过设置环境变量，Release编译查看。

C:\test>set DOTNET_JitDisasm=MainC:\test>dotnet run -c Release;Assembly listing for method ConsoleApplication.Program:Main(System.Collections.Generic.IEnumerable`1[System.String]):System.String (Instrumented Tier0);Emitting BLENDED_CODE for X64 with AVX512 - Windows;Instrumented Tier0 code;rbp based frame;fully interruptibleG_M000_IG01: ;; offset=0x0000pushrbpsubrsp, 208learbp, [rsp+0xD0]xoreax, eaxmovqword ptr [rbp-0x98], raxvxorpsxmm4, xmm4, xmm4vmovdqaxmmword ptr [rbp-0x90], xmm4vmovdqaxmmword ptr [rbp-0x80], xmm4vmovdqaxmmword ptr [rbp-0x70], xmm4vmovdqaxmmword ptr [rbp-0x60], xmm4vmovdqaxmmword ptr [rbp-0x50], xmm4movqword ptr [rbp-0x40], raxmovqword ptr [rbp-0xB0], rspmovgword ptr [rbp+0x10], rcx

更专业的可以通过LLDB来查看，但这些过程比较麻烦，有无简化的方法？当然有，即是VS2022+.NET顶级技术合成插件:Disasmo，后端通过LLVM操控。

Disasmo

插件用法：

VS2022菜单栏-】扩展-】管理扩展，搜索:Disasmo，下载即可

如果你在VS2022里面下载扩展插件速度非常慢，则可以在以下地址直接下载vsix插件：

https://marketplace.visualstudio.com/items?itemName=EgorBogatov.Disasmo

下载下来之后，双击 Disasmo.Vsix.vsix，选择:Microsoft Visual Stuido Version Selector，弹出安装对话框

安装下即可，这里需要注意如果你用命令行安装：

PSC:\> code --install-extension .\Disasmo.Vsix.vsixInstallingextensions...Error: extension/package.json not found inside zip.atZipFile.<anonymous> (D:\visusl_studio_code\Microsoft VS Code\resources\app\out\vs\code\node\cliProcessMain.js:18:15678)atObject.onceWrapper (node:events:628:28)atZipFile.emit (node:events:514:28)atFdSlicer.<anonymous> (D:\visusl_studio_code\Microsoft VS Code\resources\app\node_modules.asar\yauzl\index.js:202:10)atObject.onceWrapper (node:events:628:28)atFdSlicer.emit (node:events:514:28)atonCloseDone (D:\visusl_studio_code\Microsoft VS Code\resources\app\node_modules.asar\fd-slicer\index.js:74:12)atD:\visusl_studio_code\Microsoft VS Code\resources\app\node_modules.asar\graceful-fs\graceful-fs.js:61:14atFSReqCallback.oncomplete (node:fs:202:23)FailedInstalling Extensions: file:///c:/Disasmo.Vsix.vsix