diff --git a/NDSD-Screwdriver/App.config b/NDSD-Screwdriver/App.config
index 193aecc..709e1f1 100644
--- a/NDSD-Screwdriver/App.config
+++ b/NDSD-Screwdriver/App.config
@@ -1,6 +1,25 @@
-<?xml version="1.0" encoding="utf-8" ?>
+<?xml version="1.0" encoding="utf-8"?>
 <configuration>
     <startup> 
         <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.8" />
     </startup>
+   <appSettings>
+	   <add key="ip" value="http" />
+   </appSettings>
+  <runtime>
+    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
+      <dependentAssembly>
+        <assemblyIdentity name="System.Buffers" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.2.0" newVersion="4.0.2.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Memory" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.1.1" newVersion="4.0.1.1" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Numerics.Vectors" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.1.3.0" newVersion="4.1.3.0" />
+      </dependentAssembly>
+    </assemblyBinding>
+  </runtime>
 </configuration>
\ No newline at end of file
diff --git a/NDSD-Screwdriver/AppTool.cs b/NDSD-Screwdriver/AppTool.cs
new file mode 100644
index 0000000..7c03543
--- /dev/null
+++ b/NDSD-Screwdriver/AppTool.cs
@@ -0,0 +1,11 @@
+namespace NDSD_Screwdriver
+{
+    using System.Configuration;
+    public class AppTool
+    {
+        public static string GetIp()
+        {
+            return ConfigurationManager.AppSettings["ip"].ToString();
+        }
+    }
+}
\ No newline at end of file
diff --git a/NDSD-Screwdriver/NDSD_Screwdriver.csproj b/NDSD-Screwdriver/NDSD_Screwdriver.csproj
index 91b319d..f8eb75c 100644
--- a/NDSD-Screwdriver/NDSD_Screwdriver.csproj
+++ b/NDSD-Screwdriver/NDSD_Screwdriver.csproj
@@ -33,8 +33,11 @@
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
   <ItemGroup>
+    <Reference Include="mscorlib" />
     <Reference Include="System" />
+    <Reference Include="System.Configuration" />
     <Reference Include="System.Core" />
+    <Reference Include="System.Numerics" />
     <Reference Include="System.Xml.Linq" />
     <Reference Include="System.Data.DataSetExtensions" />
     <Reference Include="Microsoft.CSharp" />
@@ -46,6 +49,7 @@
     <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="AppTool.cs" />
     <Compile Include="Program.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="ScrewdriverTest.cs">
diff --git a/NDSD-Screwdriver/ScrewdriverTest.cs b/NDSD-Screwdriver/ScrewdriverTest.cs
index ab33ab9..0da303b 100644
--- a/NDSD-Screwdriver/ScrewdriverTest.cs
+++ b/NDSD-Screwdriver/ScrewdriverTest.cs
@@ -9,6 +9,7 @@ using System.Text;
 using System.Threading.Tasks;
 using System.Windows.Forms;
 
+
 namespace NDSD_Screwdriver
 {
     public partial class ScrewdriverTest : Form
@@ -18,7 +19,7 @@ namespace NDSD_Screwdriver
         public ScrewdriverTest()
         {
             InitializeComponent();
-            DOperate = new DOperate();
+            
         }
 
         private void DOpenButton_Click(object sender, EventArgs e)