Before you begin<\/h2>\n
To follow along, make sure you have:<\/p>\n
- \n
- Visual Studio 2026 (or Visual Studio 2022 version 17.14.17 or newer)<\/li>\n
- A GitHub Copilot license (Pro, Pro +, Business or Enterprise)<\/li>\n
- .NET desktop development workload with the following optional components enabled: GitHub Copilot and GitHub Copilot app modernization<\/li>\n<\/ul>\n
Upgrade your .NET app<\/h2>\n
Step 1: Open your project or solution<\/h3>\n
Start by launching Visual Studio and opening your .NET project or solution.<\/p>\n
Step 2: Start an agent session<\/h3>\n
You can begin in two ways:<\/p>\n
- \n
- Right-click your project or solution in Solution Explorer and select Modernize<\/li>\n
- Or open GitHub Copilot Chat and type @modernize followed by your request<\/li>\n<\/ul>\n
![\"Modernize](\"https:\/\/devblogs.microsoft.com\/dotnet\/wp-content\/uploads\/sites\/10\/2025\/11\/modernize-menu-action.webp\")
<\/p>\nStep 3: Choose your path<\/h3>\n
Next, decide what you want to do:<\/p>\n
- \n
- Upgrade to a newer .NET version for better performance and security<\/li>\n
- Migrate to Azure to unlock cloud-native capabilities<\/li>\n
- Explore more modernization options if you have additional goals<\/li>\n<\/ul>\n
![\"Upgrade](\"https:\/\/devblogs.microsoft.com\/dotnet\/wp-content\/uploads\/sites\/10\/2025\/11\/upgrade-to-newer-version-dotnet.webp\")
<\/p>\nStep 4: Assess and plan<\/h3>\n
Copilot assesses your code and dependencies, then:<\/p>\n
- \n
- Asks a few questions about your goals to tailor the plan<\/li>\n
- Generates a Markdown upgrade plan for transparency<\/li>\n
- Lets you review and edit the plan before moving forward<\/li>\n<\/ul>\n
<\/p>\n
You can edit the plan to add context, reorder steps, or exclude certain projects before approving.<\/p>\n
Step 5: Apply changes and resolve errors<\/h3>\n
Once you approve the plan, Copilot will:<\/p>\n
- \n
- Upgrade files, adjust imports, and fix syntax issues automatically<\/li>\n
- Handle build errors in a fix-and-test loop to ensure stability<\/li>\n
- Track progress in the Upgrade Progress Details document for visibility<\/li>\n
- Commit each major step to Git for easy rollback if needed<\/li>\n<\/ul>\n
If Copilot encounters a problem it can\u2019t fix automatically, it pauses and asks for your input, keeping you in control.<\/p>\n
Step 6: Review the results<\/h3>\n
After completion, Copilot provides:<\/p>\n
- \n
- A detailed report with Git commit hashes for traceability<\/li>\n
- A Next Steps section for post-upgrade actions like updating CI\/CD pipelines or running integration tests<\/li>\n<\/ul>\n
Make your app cloud ready<\/h2>\n
Modernization doesn\u2019t stop at upgrading your code. Making your app cloud-ready unlocks scalability, security, and operational efficiency. Here\u2019s how Copilot helps:<\/p>\n
Step 1: Run a cloud readiness assessment<\/h3>\n
Start by selecting Migrate to Azure from the GitHub Copilot app modernization UI.<\/p>\n
Copilot will:<\/p>\n
- \n
- Scan your project for framework compatibility and configuration gaps<\/li>\n
- Identify authentication and identity issues for cloud environments<\/li>\n
- Highlight dependency vulnerabilities that need attention<\/li>\n<\/ul>\n
When the assessment finishes, you\u2019ll see a detailed report along with:<\/p>\n
- \n
- A list of migration tasks in the chat window<\/li>\n
- Criticality ratings<\/li>\n
- Recommended actions<\/li>\n<\/ul>\n
Step 2: Approve and execute the migration plan<\/h3>\n
Similar to the upgrade process, Copilot creates a migration plan that will:<\/p>\n
- \n
- Highlight dependency updates for Azure compatibility<\/li>\n
- List configuration changes for cloud services to ensure smooth deployment<\/li>\n
- Include security enhancements for compliance<\/li>\n<\/ul>\n
Once you approve the plan, Copilot will:<\/p>\n
- \n
- Update your configuration and code<\/li>\n
- Add required Azure SDKs and authentication adapters<\/li>\n<\/ul>\n
Step 3: Validate and secure<\/h3>\n
After code remediation, Copilot will:<\/p>\n
- \n
- Run automated CVE scans on all updated dependencies<\/li>\n
- Propose safe version replacements if vulnerabilities are found<\/li>\n
- Confirm all tests pass and build integrity is maintained<\/li>\n<\/ul>\n
Step 4: Deploy to Azure<\/h3>\n
Finally, deployment is fully automated. Copilot handles:<\/p>\n
- \n
- Provisioning resources without manual scripting<\/li>\n
- Configuring monitoring and logging for observability<\/li>\n
- Securing identities for safe access<\/li>\n<\/ul>\n
From code to cloud in minutes, without writing infrastructure scripts.<\/p>\n
Try GitHub Copilot app modernization today<\/h2>\n
Ready to modernize your .NET apps faster? Whether you\u2019re upgrading frameworks or planning a cloud migration, GitHub Copilot app modernization helps you analyze large codebases, automate fixes, and save hours of manual work. Learn more<\/a> and try it out today.<\/p>\n
The post A step-by-step guide to modernizing .NET applications with GitHub Copilot agent mode<\/a> appeared first on .NET Blog<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"
Upgrading an old .NET app doesn\u2019t have to mean chasing broken builds and cryptic errors. Yet for many developers, a […]<\/p>\n","protected":false},"author":1,"featured_media":2843,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[7],"tags":[],"class_list":["post-2842","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dotnet"],"_links":{"self":[{"href":"https:\/\/rssfeedtelegrambot.bnaya.co.il\/index.php\/wp-json\/wp\/v2\/posts\/2842","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rssfeedtelegrambot.bnaya.co.il\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rssfeedtelegrambot.bnaya.co.il\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rssfeedtelegrambot.bnaya.co.il\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/rssfeedtelegrambot.bnaya.co.il\/index.php\/wp-json\/wp\/v2\/comments?post=2842"}],"version-history":[{"count":0,"href":"https:\/\/rssfeedtelegrambot.bnaya.co.il\/index.php\/wp-json\/wp\/v2\/posts\/2842\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rssfeedtelegrambot.bnaya.co.il\/index.php\/wp-json\/wp\/v2\/media\/2843"}],"wp:attachment":[{"href":"https:\/\/rssfeedtelegrambot.bnaya.co.il\/index.php\/wp-json\/wp\/v2\/media?parent=2842"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rssfeedtelegrambot.bnaya.co.il\/index.php\/wp-json\/wp\/v2\/categories?post=2842"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rssfeedtelegrambot.bnaya.co.il\/index.php\/wp-json\/wp\/v2\/tags?post=2842"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
![\"Upgrade](\"https:\/\/devblogs.microsoft.com\/dotnet\/wp-content\/uploads\/sites\/10\/2025\/11\/upgrade-plan.webp\")
<\/p>\n![\"Upgrade](\"https:\/\/devblogs.microsoft.com\/dotnet\/wp-content\/uploads\/sites\/10\/2025\/11\/progress-ui.webp\")
<\/p>\n![\"Migrate](\"https:\/\/devblogs.microsoft.com\/dotnet\/wp-content\/uploads\/sites\/10\/2025\/11\/migrate-to-azure.webp\")
<\/p>\n![\"Assessment](\"https:\/\/devblogs.microsoft.com\/dotnet\/wp-content\/uploads\/sites\/10\/2025\/11\/assessment-in-progress.webp\")
<\/p>\n![\"Assessment](\"https:\/\/devblogs.microsoft.com\/dotnet\/wp-content\/uploads\/sites\/10\/2025\/11\/assessment-report.webp\")
<\/p>\n![\"Migration](\"https:\/\/devblogs.microsoft.com\/dotnet\/wp-content\/uploads\/sites\/10\/2025\/11\/migration-plan.webp\")
<\/p>\n![\"Migration](\"https:\/\/devblogs.microsoft.com\/dotnet\/wp-content\/uploads\/sites\/10\/2025\/11\/migration-success.webp\")
<\/p>\n