Create a new .NET 5 Blazor Project

When Visual Studio 2019 creates a new Blazor app it defaults to .NET Standard 2.1. A few months ago .NET 5 was released, and upgrading Blazor apps to use .NET 5 has many strong performance improvements. I’m sure a Visual Studio update will soon make this easier, but for now to create a new .NET Blazor app running .NET 5 I use these steps:

• Create a new .NET core 3.1 Blazor App
• Edit the csproj file
  • Change SDK from Microsoft.NET.Sdk.Web to Microsoft.NET.Sdk.BlazorWebAssembly
  • Remove RazorLangVersion
  • Update TargetFramework from netstandard2.1 to net5.0
  • Remove the Microsoft.AspNetCore.Components.WebAssembly.Build package reference
• update all NuGet packages to their latest versions

Extensive details can be found on Microsoft’s official Migrate from ASP.NET Core 3.1 to 5.0 documentation page, but I find this short list of steps easier to refer to.

Download a New .NET 5.0.1 Blazor App

Here is a new project running .NET 5.0.1 with Bootstrap 5.0 alpha:

• NewBlazorApp-net5.0.1.zip

To change the project name/namespace:

• Rename the .sln and .csproj files
• Update the .sln file in a text editor to match the new filenames
• Update the namespace in Program.cs
• Update the namespaces in _Imports.razor