How to fix Razor file compilation issue in ASP.NET Core

 In this article we will learn how how to resolve the issue of Razor file compilation issue in ASP.NET Core.

Razor files with a .cshtml extension are compiled at both build and publish time using the Razor SDK. Runtime compilation may be optionally enabled by configuring your project.

Razor compilation

Build-time and publish-time compilation of Razor files is enabled by default by the Razor SDK. When enabled, runtime compilation complements build-time compilation, allowing Razor files to be updated if they're edited.

Enable runtime compilation in an existing project

To enable runtime compilation for all environments in an existing project:

1. Install the Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation NuGet package.

2. Update the project's Startup.ConfigureServices method to include a call to AddRazorRuntimeCompilation. For example:

public void ConfigureServices(IServiceCollection services)
{
    services.AddRazorPages()
        .AddRazorRuntimeCompilation();
}

For more details you can see this Video link