add new tabcontrol style and radiobutton style

HandyControl/Tools/Helper/SingleOpenHelper.cs

@@ -0,0 +1,42 @@
+using System.Collections.Generic;
+using System.Linq;
+using System.Windows.Media;
+using HandyControl.Controls;
+
+namespace HandyControl.Tools
+{
+    /// <summary>
+    ///     该类可以为可视化元素提供单开的功能
+    /// </summary>
+    public class SingleOpenHelper
+    {
+        private static readonly Dictionary<string, ISingleOpen> OpenDic = new Dictionary<string, ISingleOpen>();
+
+        /// <summary>
+        ///     根据指定的类型创建实例
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <returns></returns>
+        public static T CreateControl<T>() where T : Visual, ISingleOpen, new()
+        {
+            var typeStr = typeof(T).FullName;
+
+            if (string.IsNullOrEmpty(typeStr)) return default(T);
+
+            var temp = new T();
+            if (!OpenDic.Keys.Contains(typeStr))
+            {
+                OpenDic.Add(typeStr, temp);
+                return temp;
+            }
+            var currentCtl = OpenDic[typeStr];
+            if (currentCtl.CanDispose)
+            {
+                currentCtl.Dispose();
+                OpenDic[typeStr] = temp;
+                return temp;
+            }
+            return default(T);
+        }
+    }
+}