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NitroxPatcher/Patches/Dynamic/IngameMenu_QuitGameAsync_Patch.cs

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+using System.Collections.Generic;
+using System.Reflection;
+using System.Reflection.Emit;
+using HarmonyLib;
+using NitroxClient.Communication.Abstract;
+using NitroxModel.Helper;
+
+namespace NitroxPatcher.Patches.Dynamic;
+
+/// <summary>
+/// Skips the GameModeUtils.IsPermadeath() branch so it doesn't call SaveGameAsync().
+/// Inserts IMultiplayerSession.Disconnect() after LargeWorldStreamer streamer = LargeWorldStreamer.main
+/// </summary>
+public sealed partial class IngameMenu_QuitGameAsync_Patch : NitroxPatch, IDynamicPatch
+{
+    private static readonly MethodInfo enumeratorMethod = Reflect.Method((IngameMenu t) => t.QuitGameAsync(default));
+    private static readonly MethodInfo targetMethod = AccessTools.EnumeratorMoveNext(enumeratorMethod);
+
+    public static IEnumerable<CodeInstruction> Transpiler(IEnumerable<CodeInstruction> instructions)
+    {
+        return new CodeMatcher(instructions)
+               .MatchEndForward(
+                   new CodeMatch(OpCodes.Call, Reflect.Method(() => GameModeUtils.IsPermadeath()))
+               )
+               .Set(OpCodes.Ldc_I4_0, null)
+               .MatchEndForward(
+                   new CodeMatch(OpCodes.Ldsfld, Reflect.Field(() => LargeWorldStreamer.main))
+               )
+               .Advance(2)
+               .Insert(
+                   TranspilerHelper.LocateService<IMultiplayerSession>(),
+                   new CodeInstruction(OpCodes.Callvirt, Reflect.Method((IMultiplayerSession x) => x.Disconnect()))
+               )
+               .InstructionEnumeration();
+    }
+}