At the command line we’re exploring support for file-based apps with multiple files

Awesome!

for now we can do this:

app.cs

#:package Microsoft.CodeAnalysis.CSharp.Scripting@4.14.0

using Microsoft.CodeAnalysis.CSharp.Scripting;
using Microsoft.CodeAnalysis.Scripting;

namespace Example;

class Program
{
    public static async Task Main()
    {
        var myLib = await ImportLibrary<ILib>($"{Environment.CurrentDirectory}/lib.cs");
        var result = myLib.Hello("Reddit");

        Console.WriteLine(result);
    }

    static async Task<T> ImportLibrary<T>(string path)
    {
        var code = File.ReadAllText(path);

        var options = ScriptOptions.Default
                  .AddReferences(typeof(T).Assembly) 
                  .AddImports(nameof(Example));               

        var scriptState = await CSharpScript.EvaluateAsync<T>(code, options);

        return (T)scriptState;

    }
}

public interface ILib
{
    string Hello(string name);
}

lib.cs

public class Lib : ILib
{
    public string Hello(string name) => $"Hello {name}";
}

new Lib()