1

Assets/BITKit/Core/Extensions/Func.cs

@@ -8,7 +8,7 @@ namespace BITKit
     {
         public static IEnumerable<Func<T0, T1>> CastAsFunc<T0, T1>(this Func<T0, T1> self)
         {
-            return self?.GetInvocationList().Cast<Func<T0, T1>>();
+            return self is null ? Array.Empty<Func<T0,T1>>() : self?.GetInvocationList().Cast<Func<T0, T1>>();
         }
 
         public static IEnumerable<Func<T0, T1, T2>> CastAsFunc<T0, T1, T2>(this Func<T0, T1, T2> self)

Assets/BITKit/Core/Extensions/IEnumerable.cs

@@ -205,11 +205,11 @@ namespace BITKit
         }
         public static IEnumerable<T> TrySelectFirst<T>(this IEnumerable<T> self, Action<T> action)
         {
-            if (self.Count() > 0)
+            if (self.Any())
             {
                 action.Invoke(self.First());
             }
-            return self;
+            return self; 
         }
         public static bool TryGetAny<T>(this IEnumerable<T> self, Func<T, bool> factory, out T any)
         {

Assets/BITKit/Core/Item/ItemContainer.cs

@@ -58,10 +58,7 @@ namespace BITKit
         /// 已添加Item的回调
         /// </summary>
         event Action<IBasicItem> OnAdd;
-        /// <summary>
-        /// 已使用Item的回调
-        /// </summary>
-        event Action<IBasicItem> OnUsed;
+    
         /// <summary>
         /// 已移除Item的回调
         /// </summary>