<Project Sdk="Microsoft.NET.Sdk.BlazorWebAssembly">

   <PropertyGroup>

      <TargetFramework>net5.0</TargetFramework>

   </PropertyGroup>

   <ItemGroup>

      <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly" Version="5.0.1" />

      <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.DevServer" Version="5.0.1" PrivateAssets="all" />

      <PackageReference Include="System.Net.Http.Json" Version="5.0.0" />

   </ItemGroup>

</Project>

​

using System;

​

class Program

{

    static void Main(string[] args)

    {

        Console.WriteLine("Hello World!");

    }

}

You typed to many # like myself.