patch max players in lobby

BigLobby.csproj

@@ -7,6 +7,7 @@
     <Version>1.0.0</Version>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <LangVersion>latest</LangVersion>
+    <NoWarn>$(NoWarn);Harmony003</NoWarn>
   </PropertyGroup>
 
   <ItemGroup>

Patches/LobbySize.cs

@@ -0,0 +1,42 @@
+using HarmonyLib;
+using Steamworks;
+using Steamworks.Data;
+using UnityEngine;
+
+namespace BigLobby.Patches
+{
+    [HarmonyPatch(typeof(SteamMatchmaking))]
+    internal class SteamLobbySize
+    {
+        [HarmonyPatch(nameof(SteamMatchmaking.CreateLobbyAsync))]
+        [HarmonyPrefix]
+        public static void SetMaxMembers(ref int maxMembers) {
+            maxMembers = Plugin.MaxPlayers;
+        }
+    }
+    [HarmonyPatch(typeof(GameNetworkManager))]
+    internal class LobbyJoinable {
+        [HarmonyPatch(nameof(GameNetworkManager.LobbyDataIsJoinable))]
+        [HarmonyPrefix]
+        public static bool SkipLobbySizeCheck(ref GameNetworkManager __instance, ref bool __result, Lobby lobby) {
+            string data = lobby.GetData("vers");
+            if (data != __instance.gameVersionNum.ToString())
+            {
+                Debug.Log($"Lobby join denied! Attempted to join vers.{data} lobby id: {lobby.Id}");
+                UnityEngine.Object.FindObjectOfType<MenuManager>().SetLoadingScreen(isLoading: false, RoomEnter.DoesntExist, $"The server host is playing on version {data} while you are on version {__instance.gameVersionNum}.");
+                __result = false;
+                return false;
+            }
+            if (lobby.GetData("joinable") == "false")
+            {
+                Debug.Log("Lobby join denied! Host lobby is not joinable");
+                UnityEngine.Object.FindObjectOfType<MenuManager>().SetLoadingScreen(isLoading: false, RoomEnter.DoesntExist, "The server host has already landed their ship, or they are still loading in.");
+                __result = false;
+                return false;
+            }
+            // Lobby member count check is skipped here, see original method
+            __result = true;
+            return false;
+        }
+    }
+}

Plugin.cs

@@ -9,12 +9,12 @@ public class Plugin : BaseUnityPlugin
     {
         public static int MaxPlayers = 8;
 
-        private Harmony harmony;
+        private Harmony _harmony;
         private void Awake()
         {
             Logger.LogInfo($"{PluginInfo.PLUGIN_GUID} loaded");
 
-            harmony = Harmony.CreateAndPatchAll(Assembly.GetExecutingAssembly());
+            _harmony = Harmony.CreateAndPatchAll(Assembly.GetExecutingAssembly());
         }
     }
 }