From f7a07aec02658cd289f283bb1e992d511ed9f5c1 Mon Sep 17 00:00:00 2001
From: Paulo <pnmanjos@hotmail.com>
Date: Wed, 24 Nov 2021 09:57:06 -0300
Subject: [PATCH] Add default nullable enum typereader (#1518)

---
 src/Discord.Net.Commands/CommandService.cs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/Discord.Net.Commands/CommandService.cs b/src/Discord.Net.Commands/CommandService.cs
index db08d0d79..bd65b0eb7 100644
--- a/src/Discord.Net.Commands/CommandService.cs
+++ b/src/Discord.Net.Commands/CommandService.cs
@@ -438,6 +438,13 @@ namespace Discord.Commands
                 _defaultTypeReaders[type] = reader;
                 return reader;
             }
+            var underlyingType = Nullable.GetUnderlyingType(type);
+            if (underlyingType != null && underlyingType.IsEnum)
+            {
+                reader = NullableTypeReader.Create(underlyingType, EnumTypeReader.GetReader(underlyingType));
+                _defaultTypeReaders[type] = reader;
+                return reader;
+            }
 
             //Is this an entity?
             for (int i = 0; i < _entityTypeReaders.Count; i++)