Using raylib.dll in Unity

RaylibTest.cs

//  https://unitycoder.com/blog/2019/12/09/using-raylib-dll-in-unity

using UnityEngine;
using Raylib;
using rl = Raylib.Raylib;
using Color = Raylib.Color;

public class RaylibTest : MonoBehaviour
{
    void Start()
    {
        rl.InitWindow(640, 480, "Hello World");
        while (!rl.WindowShouldClose())
        {
            rl.BeginDrawing();
            rl.ClearBackground(Color.WHITE);
            rl.DrawText("Hello, world!", 12, 12, 20, Color.BLACK);
            rl.EndDrawing();
        }
        rl.CloseWindow();
    }
}