修复了全局节点连接异常异常。

Library/Utils/LinqHelper.cs

@@ -10,8 +10,28 @@ namespace Serein.Library.Utils
     /// <summary>
     /// 对于 linq 的异步扩展方法
     /// </summary>
-    public static class LinqAsyncHelper
+    public static class LinqHelper
     {
+        /// <summary>
+        /// 根据条件筛选，只保留第一个满足条件的元素，其余的不包含。
+        /// </summary>
+        public static IEnumerable<T> DistinctByCondition<T>(
+            this IEnumerable<T> source,
+            Func<T, bool> predicate)
+        {
+            var seenKeys = new HashSet<T>();
+
+            foreach (var item in source)
+            {
+                if (!predicate(item))
+                    continue;
+
+                /*var key = keySelector(item);
+                if (seenKeys.Add(key)) // 如果是新键*/
+                yield return item;
+            }
+        }
+
         public static async Task<IEnumerable<TResult>> SelectAsync<TSource, TResult>(this IEnumerable<TSource> source,
                                                                                           Func<TSource, Task<TResult>> method)
         {

Library/Utils/ObjectPool.cs

@@ -42,7 +42,8 @@ namespace Serein.Library.Utils
 
         public ObjectPool(Factory factory)
             : this(factory, Environment.ProcessorCount * 2)
-        { }
+        {
+        }
 
         public ObjectPool(Factory factory, int size)
         {