How do I set the release mode (e.g. "debug", "release") for a CSharp file in `X.csproj`

We're getting ever closer to the release of the new and improved Janky in CSharp. However, I face a new challenge, I'm using CLI tools to do building, and a lot of the tutorials I find when searching are for VSCode building.
Since I'm not using VSCode, I was wondering if there is some option in X.csproj (language.csproj) that would let me achieve this.

Currently, I'm using the default csproj file, since it's in XML (ewwwwww.... (any alternatives to the XML format?)), and I don't know what any of the tags do.
This is currently what it looks like:

<Project Sdk="Microsoft.NET.Sdk">
    <PropertyGroup>
        <TargetFramework>net5.0</TargetFramework>
        <OutputType>Exe</OutputType>
    </PropertyGroup>
</Project>

Thanks!
Cheers!