rimworld-mod-template/Source/Main.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;

using UnityEngine;
using Verse;
using Verse.AI;
using Verse.AI.Group;
using Verse.Sound;
using Verse.Noise;
using Verse.Grammar;
using RimWorld;
using RimWorld.Planet;

//using System.Reflection;
//using HarmonyLib;

namespace Template
{
    [DefOf]
    public class TemplateDefOf
    {
        public static LetterDef success_letter;
    }

    public class MyMapComponent : MapComponent
    {
        public MyMapComponent(Map map) : base(map)
        {
        }

        public override void FinalizeInit()
        {
            Messages.Message("Success", null, MessageTypeDefOf.PositiveEvent);
            Find.LetterStack.ReceiveLetter("Success", TemplateDefOf.success_letter.description, TemplateDefOf.success_letter, null);
        }
    }
}