Console Application: Program does not contain a static 'Main' method suitable for an entry point - While Main exists - .net-core

Question

My .NET 5 project's Program.cs looks like this:
using System;
namespace XmlGenerator.Cli
{
public class Program
{
public static void Main(string[] args)
{
Console.WriteLine(("Boo!!!"));
}
}
}
And my project file looks like this:
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net5.0</TargetFramework>
</PropertyGroup>
<ItemGroup>
<Compile Remove="Program.cs" />
</ItemGroup>
<ItemGroup>
<None Remove="Master.xml" />
</ItemGroup>
<ItemGroup>
<Content Include="Program.cs">
<CopyToOutputDirectory>Always</CopyToOutputDirectory>
</Content>
</ItemGroup>
<ItemGroup>
<Resource Include="Master.xml" />
</ItemGroup>
</Project>
When I try and run the app with F5, I get the following error:
CS5001 Program does not contain a static 'Main' method suitable for an entry point
I certainly does contain a Main, so what could be wrong?

Answer 1

My solution was to delete all the ItemGroup elements from the project file, leaving just:
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net5.0</TargetFramework>
<LangVersion>7.1</LangVersion>
</PropertyGroup>
</Project>