Follow the step-by-step procedure below to create a Blazor WebAssembly (client-side) application in Visual Studio 2019.
Download and install Visual Studio 2019
Download and install the latest version of Visual Studio 2019 with the ASP.NET and web development workload.
Create a new project
Open Visual Studio 2019 and select Create a new project .
Select Blazor app from the template
Select Blazor App from the template list and click the Next.
Configuring the project
The project configuration window will pop up. Click Create button to create a new project with the default project configuration.
Choose Blazor WebAssembly App
Select a target framework based on your requirements, choose Blazor WebAssembly App from the dashboard, and then click Create to create a new Blazor WebAssembly application.
Blazor WebAssembly App structure
Now the Blazor WebAssemblyApp is created, and the structure look like in the below image.
Run the application.
Press ctrl + F5 to run the application and see the below output in default browser.
Refer to this link for more details.