Fix issue #140 (AssetBundles cannot be loaded at runtime) (#197)

* Fix issue #140 (AssetBundles cannot be loaded at runtime)

* Revert Il2CppObjectPool.cs and change incorrect typeof

* Revert typeof changes and correction IL code comment

Il2CppInterop.Runtime/InteropTypes/Il2CppObjectBase.cs

@@ -84,8 +84,8 @@ public T Unbox<T>() where T : unmanaged
     private static readonly Type[] _intPtrTypeArray = { typeof(IntPtr) };
     private static readonly MethodInfo _getUninitializedObject = typeof(RuntimeHelpers).GetMethod(nameof(RuntimeHelpers.GetUninitializedObject))!;
     private static readonly MethodInfo _getTypeFromHandle = typeof(Type).GetMethod(nameof(Type.GetTypeFromHandle))!;
-    private static readonly MethodInfo _createGCHandle = typeof(Il2CppObjectBase).GetMethod(nameof(CreateGCHandle))!;
-    private static readonly FieldInfo _isWrapped = typeof(Il2CppObjectBase).GetField(nameof(isWrapped))!;
+    private static readonly MethodInfo _createGCHandle = typeof(Il2CppObjectBase).GetMethod(nameof(CreateGCHandle), BindingFlags.Instance | BindingFlags.NonPublic)!;
+    private static readonly FieldInfo _isWrapped = typeof(Il2CppObjectBase).GetField(nameof(isWrapped), BindingFlags.Instance | BindingFlags.NonPublic)!;
 
     internal static class InitializerStore<T>
     {
@@ -112,7 +112,7 @@ private static Func<IntPtr, T> Create()
                 // However, it could be be user-made or implicit
                 // In that case we set the GCHandle and then call the ctor and let GC destroy any objects created by DerivedConstructorPointer
 
-                // var obj = (T)FormatterServices.GetUninitializedObject(type);
+                // var obj = (T)RuntimeHelpers.GetUninitializedObject(type);
                 il.Emit(OpCodes.Ldtoken, type);
                 il.Emit(OpCodes.Call, _getTypeFromHandle);
                 il.Emit(OpCodes.Call, _getUninitializedObject);
@@ -126,7 +126,7 @@ private static Func<IntPtr, T> Create()
                 // obj.isWrapped = true;
                 il.Emit(OpCodes.Dup);
                 il.Emit(OpCodes.Ldc_I4_1);
-                il.Emit(OpCodes.Stsfld, _isWrapped);
+                il.Emit(OpCodes.Stfld, _isWrapped);
 
                 var parameterlessConstructor = type.GetConstructor(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic, Type.EmptyTypes);
                 if (parameterlessConstructor != null)