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diff --git a/源代码/.vs/StgSharp/v17/.futdcache.v2 b/源代码/.vs/StgSharp/v17/.futdcache.v2
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diff --git a/源代码/.vs/StgSharp/v17/.suo b/源代码/.vs/StgSharp/v17/.suo
index 97738eb3..7f603850 100644
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diff --git a/源代码/.vs/StgSharp/v17/Browse.VC.db b/源代码/.vs/StgSharp/v17/Browse.VC.db
index 1672ef53..6a43a67d 100644
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diff --git a/源代码/StgSharp/Logic/LinkedList.cs b/源代码/StgSharp/Logic/LinkedList.cs
index 40cd5fe7..db0c84bf 100644
--- a/源代码/StgSharp/Logic/LinkedList.cs
+++ b/源代码/StgSharp/Logic/LinkedList.cs
@@ -109,14 +109,20 @@ namespace StgSharp
 
         internal LinkedListNode<T> Find(T value)
         {
-            foreach (LinkedListNode<T> node in this)
+            LinkedListNode<T> enumerator = this._hook;
+            do
             {
-                if (node._value.Equals(value))
-                {
-                    return node;
-                }
+                enumerator = enumerator._next;
+                Console.WriteLine(enumerator.Value.ToString());
+            } while (!enumerator.Value.Equals(value)
+            || enumerator == _hook);
+
+            if (enumerator == _hook)
+            {
+                throw new Exception();
             }
-            throw new Exception("Value not found in this LinkedList");
+
+            return enumerator;
         }
 
         public void Clear()
diff --git a/源代码/StgSharp/Math/Scalar/Sin.cs b/源代码/StgSharp/Math/Scalar/Sin.cs
index 0f2a309a..0eca0b49 100644
--- a/源代码/StgSharp/Math/Scalar/Sin.cs
+++ b/源代码/StgSharp/Math/Scalar/Sin.cs
@@ -1,7 +1,11 @@
-namespace StgSharp.Math
+using System.Net.NetworkInformation;
+
+namespace StgSharp.Math
 {
     public static partial class Calc
     {
+        public const float Pi = 3.1415926f;
+
         private static readonly float[] sinData =
             {
             0f, 0.15643446239373f,  0.309016989278255f, 0.453990492577218f, 0.587785243621462f,
diff --git a/源代码/StgSharp/bin/Debug/netstandard2.1/StgSharp.dll b/源代码/StgSharp/bin/Debug/netstandard2.1/StgSharp.dll
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diff --git a/源代码/StgSharp/obj/Debug/netstandard2.1/ref/StgSharp.dll b/源代码/StgSharp/obj/Debug/netstandard2.1/ref/StgSharp.dll
index ef366fc4..ab71adb1 100644
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diff --git a/源代码/StgSharp/obj/Debug/netstandard2.1/refint/StgSharp.dll b/源代码/StgSharp/obj/Debug/netstandard2.1/refint/StgSharp.dll
index ef366fc4..ab71adb1 100644
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diff --git a/源代码/StgSharpDebug/Debug.cs b/源代码/StgSharpDebug/Debug.cs
index a76d81bf..3c610e56 100644
--- a/源代码/StgSharpDebug/Debug.cs
+++ b/源代码/StgSharpDebug/Debug.cs
@@ -20,10 +20,10 @@ namespace StgSharp
                 list.Add(str);
             }
 
-            foreach (string str in list)
-            {
-                Console.WriteLine(str);
-            }
+            string a = "sdfsdfdsfds";
+            list.Add(a);
+
+            list.Remove(a);
 
             /*
             Form f2 = new Form();
diff --git a/源代码/StgSharpDebug/bin/x64/Debug/net6.0/StgSharpDebug.dll b/源代码/StgSharpDebug/bin/x64/Debug/net6.0/StgSharpDebug.dll
index b4fbc9d7..2d098448 100644
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