Remove custom OptionalType and use the default c# nullable type.

Source/Framework/Dynamic/OptionalType.cs

@@ -1,63 +0,0 @@
-/*
- * Copyright (C) 2012-2020 CypherCore <http://github.com/CypherCore>
- * 
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-namespace Framework.Dynamic
-{
-    public struct Optional<T>
-    {
-        private bool _hasValue;
-        public T Value;
-
-        public Optional(T value)
-        {
-            Value = value;
-            _hasValue = true;
-        }
-
-        public bool HasValue
-        {
-            get { return _hasValue; }
-        }
-
-        public void Set(T value)
-        {
-            Value = value;
-            _hasValue = true;
-        }
-
-        public void Clear()
-        {
-            _hasValue = false;
-            Value = default;
-        }
-
-        public T ValueOr(T otherValue)
-        {
-            return HasValue ? Value : otherValue;
-        }
-
-        public static explicit operator T(Optional<T> optional)
-        {
-            return optional.Value;
-        }
-
-        public static implicit operator Optional<T>(T value)
-        {
-            return new Optional<T>(value);
-        }
-    }
-}

Source/Framework/Dynamic/TaskScheduler.cs

@@ -403,7 +403,7 @@ namespace Framework.Dynamic
         {
             _end = end;
             _duration = duration;
-            _group.Set(group);
+            _group = group;
             _repeated = repeated;
             _task = task;
         }
@@ -427,12 +427,12 @@ namespace Framework.Dynamic
         /// <returns></returns>
         public bool IsInGroup(uint group)
         {
-            return _group.HasValue && _group.Value == group;
+            return _group.HasValue && _group == group;
         }
 
         internal DateTime _end;
         internal TimeSpan _duration;
-        internal Optional<uint> _group;
+        internal uint? _group;
         internal uint _repeated;
         internal Action<TaskContext> _task;
     }
@@ -551,7 +551,7 @@ namespace Framework.Dynamic
         /// <returns></returns>
         TaskContext SetGroup(uint group)
         {
-            _task._group.Set(group);
+            _task._group = group;
             return this;
         }
 
@@ -561,7 +561,7 @@ namespace Framework.Dynamic
         /// <returns></returns>
         TaskContext ClearGroup()
         {
-            _task._group.Clear();
+            _task._group = null;
             return this;
         }