From 1b6adc58f6c0c17cb535d93c2afefa87c29a2dff Mon Sep 17 00:00:00 2001
From: lindexi <lindexi_gd@163.com>
Date: Sat, 11 Jul 2020 11:48:17 +0800
Subject: [PATCH 1/2] Improve Deque initialization performance

---
 .../HandyControl_Shared/Tools/Queue/Deque!1.cs   | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/src/Shared/HandyControl_Shared/Tools/Queue/Deque!1.cs b/src/Shared/HandyControl_Shared/Tools/Queue/Deque!1.cs
index d15c992c..cb44085f 100644
--- a/src/Shared/HandyControl_Shared/Tools/Queue/Deque!1.cs
+++ b/src/Shared/HandyControl_Shared/Tools/Queue/Deque!1.cs
@@ -65,19 +65,11 @@ namespace HandyControl.Tools
 
         public Deque(IEnumerable<T> backCollection, IEnumerable<T> frontCollection)
         {
-            if (backCollection == null && frontCollection == null) throw new ArgumentException("Collections cannot both be null");
-            _front = new List<T>();
-            _back = new List<T>();
+            if (backCollection == null && frontCollection == null)
+                throw new ArgumentException("Collections cannot both be null");
 
-            if (backCollection != null)
-            {
-                foreach (var item in backCollection) _back.Add(item);
-            }
-
-            if (frontCollection != null)
-            {
-                foreach (var item in frontCollection) _front.Add(item);
-            }
+            _front = frontCollection != null ? new List<T>(frontCollection) : new List<T>();
+            _back = backCollection != null ? new List<T>(backCollection) : new List<T>();
         }
 
         public void AddFirst(T item)

From 6cc25f892d1f7a07fa61bf02295e5a8e7def2037 Mon Sep 17 00:00:00 2001
From: lindexi <lindexi_gd@163.com>
Date: Sat, 11 Jul 2020 11:49:10 +0800
Subject: [PATCH 2/2] Format code

---
 src/Shared/HandyControl_Shared/Tools/Queue/Deque!1.cs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/Shared/HandyControl_Shared/Tools/Queue/Deque!1.cs b/src/Shared/HandyControl_Shared/Tools/Queue/Deque!1.cs
index cb44085f..af1aaf1f 100644
--- a/src/Shared/HandyControl_Shared/Tools/Queue/Deque!1.cs
+++ b/src/Shared/HandyControl_Shared/Tools/Queue/Deque!1.cs
@@ -65,8 +65,7 @@ namespace HandyControl.Tools
 
         public Deque(IEnumerable<T> backCollection, IEnumerable<T> frontCollection)
         {
-            if (backCollection == null && frontCollection == null)
-                throw new ArgumentException("Collections cannot both be null");
+            if (backCollection == null && frontCollection == null) throw new ArgumentException("Collections cannot both be null");
 
             _front = frontCollection != null ? new List<T>(frontCollection) : new List<T>();
             _back = backCollection != null ? new List<T>(backCollection) : new List<T>();