Add XmlSerializerPatch (Prevents Exception when using collectable type in generic for xml serialization)

CringeLauncher/Patches/XmlSerializerPatch.cs

@@ -0,0 +1,37 @@
+using HarmonyLib;
+using System.Reflection;
+using System.Xml.Serialization;
+
+namespace CringeLauncher.Patches;
+
+[HarmonyPatch]
+internal static class XmlSerializerPatch
+{
+    [HarmonyTargetMethod]
+    private static MethodInfo TargetMethod() => AccessTools.Method(
+        typeof(XmlSerializer).Assembly.GetType("System.Xml.Serialization.TempAssembly"),
+        "GenerateRefEmitAssembly");
+
+    [HarmonyTranspiler]
+    private static List<CodeInstruction> Transpiler(IEnumerable<CodeInstruction> instructions)
+    {
+        var list = instructions.ToList();
+        var method = AccessTools.PropertyGetter(typeof(Type), nameof(Type.Assembly));
+        var index = list.FindIndex(x => x.Calls(method));
+        list[index] = CodeInstruction.Call(typeof(XmlSerializerPatch), nameof(GetCorrectAssembly));
+        return list;
+    }
+
+    private static Assembly GetCorrectAssembly(Type type)
+    {
+        if (type.Assembly.IsCollectible || type.GenericTypeArguments is not { } genericArgs || genericArgs.Length == 0)
+            return type.Assembly;
+
+        foreach (var assembly in genericArgs.Select(x => x.Assembly))
+        {
+            if (assembly.IsCollectible)
+                return assembly;
+        }
+        return type.Assembly;
+    }
+}