I recently came across an interesting issue where after starting a new ASP.NET Core 5.0 .NET 5 project using the “ASP.NET Core Web App (Model-View-Controller)” template did not include the ability to update .cshtml Razor files without recompiling and restarting the whole app. I am not sure why this is not included in the templates as it massively slows down the development cycle, but this is how to fix it.
First, you need to head to the Nuget Package explorer by right clicking on the Dependencies node of your project tree selecting “Manage NuGet packages…”. Search for and install Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation. Install it and it’s dependencies into your project.
Then head to Startup.cs. Find the line within ConfigureServices() that says “services.AddControllersWithViews()” and add “.AddRazorRuntimeCompilation()”. You won’t be able to add this line without first installing the previous NuGet package.
Now run your app. You will see that changing the contents of Razor .cshtml files and refreshing the page will cause the view to be updated with your new content, without having to stop and recompile.