Solution for the task "Run the Java Hello World example via both dotnet run and javac"

Program.csrpoj

<Project Sdk="Microsoft.NET.Sdk">
    <PropertyGroup>
        <OutputType>Exe</OutputType>
        <TargetFramework>net6.0</TargetFramework>
        <EnableDefaultCompileItems>false</EnableDefaultCompileItems>
    </PropertyGroup>
    <Target Name="GenerateCsharp" BeforeTargets="BeforeBuild" KeepDuplicateOutputs="true">
        <WriteLinesToFile File="Program.generated.cs" Overwrite="true" Encoding="Unicode" Lines="$([System.IO.File]::ReadAllText('Program.java').Replace('main','Main').Replace('System.out.println','System.Console.WriteLine'))" />
        <ItemGroup>
            <Compile Include="Program.generated.cs" />
        </ItemGroup>
    </Target>
</Project>

Program.java

class Program {
    public static void main(String[] args) {
        System.out.println("Hello, World!");
    }
}

Забув .Replace('String','string')