+ 增加了一个类

SunnyUI.Demo/Controls/FButton.Designer.cs

@@ -937,7 +937,6 @@
             this.uiToolTip1.Font = new System.Drawing.Font("微软雅黑", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
             this.uiToolTip1.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(239)))), ((int)(((byte)(239)))), ((int)(((byte)(239)))));
             this.uiToolTip1.OwnerDraw = true;
-            this.uiToolTip1.ToolTipTitle = "ToolTip title";
             // 
             // uiSymbolButton1
             // 

SunnyUI/SunnyUI.csproj

@@ -402,6 +402,7 @@
     <Compile Include="Controls\UIToolTip.cs">
       <SubType>Component</SubType>
     </Compile>
+    <Compile Include="Units\UConcurrentDoubleKeyDictionary.cs" />
     <Compile Include="Units\USnowflakeID.cs" />
     <Compile Include="Units\UThunder.cs" />
     <Compile Include="Controls\UILine.cs">

SunnyUI/Units/UConcurrentDoubleKeyDictionary.cs

@@ -0,0 +1,103 @@
+/******************************************************************************
+ * SunnyUI 开源控件库、工具类库、扩展类库、多页面开发框架。
+ * CopyRight (C) 2012-2020 ShenYongHua(沈永华).
+ * QQ群：56829229 QQ：17612584 EMail：SunnyUI@qq.com
+ *
+ * Blog:   https://www.cnblogs.com/yhuse
+ * Gitee:  https://gitee.com/yhuse/SunnyUI
+ * GitHub: https://github.com/yhuse/SunnyUI
+ *
+ * SunnyUI.dll can be used for free under the GPL-3.0 license.
+ * If you use this code, please keep this note.
+ * 如果您使用此代码，请保留此说明。
+ ******************************************************************************
+ * 文件名称: ULogFile.cs
+ * 文件说明: 双主键线程安全字典，适用场景主键和键值都唯一，可双向查找
+ * 当前版本: V2.2
+ * 创建日期: 2020-08-17
+ *
+ * 2020-08-17: V2.2.7 增加文件说明
+******************************************************************************/
+
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace Sunny.UI
+{
+    public class ConcurrentDoubleKeyDictionary<TKey1, TKey2>
+    {
+        private readonly ConcurrentDictionary<TKey1, TKey2> Key1 = new ConcurrentDictionary<TKey1, TKey2>();
+        private readonly ConcurrentDictionary<TKey2, TKey1> Key2 = new ConcurrentDictionary<TKey2, TKey1>();
+
+        public void TryAdd(TKey1 key1, TKey2 key2)
+        {
+            Key1.AddOrUpdate(key1, key2);
+            Key2.AddOrUpdate(key2, key1);
+        }
+
+        public TKey2 this[TKey1 key1]
+        {
+            get => GetKey2(key1);
+            set => TryAdd(key1, value);
+        }
+
+        public int Count => Key1.Count;
+
+        public void RemoveByKey1(TKey1 key1)
+        {
+            if (ContainsKey1(key1))
+            {
+                TKey2 key2 = GetKey2(key1);
+                Key1.TryRemove(key1, out _);
+                if (ContainsKey2(key2)) Key2.TryRemove(key2, out _);
+            }
+        }
+
+        public void RemoveByKey2(TKey2 key2)
+        {
+            if (ContainsKey2(key2))
+            {
+                TKey1 key1 = GetKey1(key2);
+                Key2.TryRemove(key2, out _);
+                if (ContainsKey1(key1)) Key1.TryRemove(key1, out _);
+            }
+        }
+
+        public TKey2 GetKey2(TKey1 key1)
+        {
+            return Key1.ContainsKey(key1) ? Key1[key1] : default(TKey2);
+        }
+
+        public TKey1 GetKey1(TKey2 key2)
+        {
+            return Key2.ContainsKey(key2) ? Key2[key2] : default(TKey1);
+        }
+
+        public bool ContainsKey1(TKey1 key1)
+        {
+            return Key1.ContainsKey(key1);
+        }
+
+        public bool ContainsKey2(TKey2 key2)
+        {
+            return Key2.ContainsKey(key2);
+        }
+
+        public IList<TKey1> Key1List()
+        {
+            return Key1.Keys.ToList();
+        }
+
+        public IList<TKey2> Key2List()
+        {
+            return Key2.Keys.ToList();
+        }
+
+        public void Clear()
+        {
+            Key1.Clear();
+            Key2.Clear();
+        }
+    }
+}